HomeMy WebLinkAboutRES 2023-043BOARD OF COTINTY COMMISSIONERS
COUNTY OF KITTITAS
STATE OF WASHINGTON
RESOLUTION NO. 2023 -p47
ADOPTING THE KITTITAS COUNTY ROAD SAFETY PLAN 2023-2025
WHEREAS: In accordance with Washington State Department of Transportation's (WSDOT)
2023 Federcl Highway Safety Improvement Program (HSIP) County Road Safeiy
Program call for projects, Public Works has prepared a Kittitas County Road
Safety Plan2023-2025 updating the plan prepared,in202l; and,
WHEREAS: The Kittitas County Road Safety Plan2023-2025 identifies prioritized locations
for low cost, beneficial, county wide safety improvements based upon crash data,
roadway investigations, engineering judgement, and risk-based analysis as set
forth in WSDOT's HSIP call for project guidance; and
WHEREAS: The deadline for County grant submittal is March 15,2023,and an adopted plan
is required supporting grant submittal;
NOW' THEREFORE BE IT RESOLVED that the Board of County Commissioners, in the
best interest of the public, does hereby adopt the Kittitas County Roai Safety plan2023-2025,
hereto attached.
DATED this 7th day of March2023,at Ellensburg, Washington.
BOARD OF COLTNTY COMMISSIONERS
GTON
Board- Julie Kjorsvik
/liJ|il1\l\\\Brett Vice-Chairman
Commissioner
n Deputy Clerk of the Board- Mandy Buchholz
Kittitas County
Road Safety lmprovement Pla n 2023
February 22,2023
Kittitas County
Public Works Department
411 North Ruby Street, Suite 1
Ellensburg, WA 98926
t
Contents
Executive Summary,.,.,,.
Appendix B: Road Segment Scoring and Project Prioritization..
,,3
Risk-Based Prioritization Methodology ........................... 7
Development of Road Segment Safety lmprovements .........................9
Prioritized CostEffective Safety lmprovement Projects 10
Priority 1: Huntzinger R0ad............ .........13
Priority 2; Bridge and Structure lmprovement Plan ..........,.. ............... j.5
Priority 3: Denmark Road Safety lmprovements ............L7
Priority 4: Horizontal Road Curvature................. ..........19
Appendix A: Kittitas County Collision Data,2017-2021 ..,,25
..,.29
2
Executive Summary
The Kittitas County Road Safety Plan2023 is a continuation of a biennial road safety plan program created to reduce
collisions within the County Road network. Following the Washington State Department of Transportation's (WSDOT)
Highway Safety lmprovement Plan (HSIP) grant application methodology for creating a prioritized road safety plan,
crash data analysis in combination with staff identification of certain roadway characteristics throughout the County
Road network, a list of prioritized projects implementing various countermeasures was created. These projects were
further prioritized with engineering judgement using considerations such as estimated project cost, feasibility, and
improvement timing, Total project costs were also determined and accumulated, and if needed, broken down in
phases to be completed as funding opportunity allows.
o Prioritv One. Huntzinqer Rd Safetv lmprovements
Phases identified by milepost instead of total score because all phases are priority one. Milepost conscious
phases allowthe county to continue heading south along the corridor, Phase breakdowns are provided in
the project description with further cost estimates per phase.
ESTIMATED P ROJ ECT CO ST :
o Phase I -$1,590,700
. Phase Z-$l,4iT,TTi
Prioritv Two - Bridqe and Structure lmprovement
178 bridges and structures were ldentified as in need of improvements in previous safety plans as well as
the 2023 safety plan, Due to limited county forces, this project will allow the County to solicit an outside
consulting service to evaluate and prioritize a systematic way to address these deficient bridges and
structures by creating a crashworthy and cost-effective solution. Although the County has already invested
in prioritizing and grouping these structures, additional research, planning, and engineering is required to
create feasible projects that meet current standards. The desired outcome of this planning effort would be a
systematic process to begin addressing the 178 identified bridges and shuctures.
ESTIMATED PROJECT COST. $15O,OOO
Prioritv Three - Denmark Rd
Denmark Rd MP 0,5 to MP 4.35 has moved up in scoring prioritization, lt was noted in our previou s 2017 ,
2019, and 2021 Road Safety Plans as a safety priority. This roadway has five bridges/structures that have
deficient or no bridge rail, The segment scoring 100 has a curve that needs safety improvements and
contains accident history. This project would provide safety countermeasures to the entire Denmark Rd
corridor,
ESTIMATED PROJ ECT COST . $2,704,488
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a Priority Four - County-wide Horizontal Curvature Plan
Roads with horizontal curves have been identified by Kittitas County as high-risk areas susceptible to motor
vehicle accidents. lt was noted in previous safety plans the need for Kittitas County to implement a way to
collect horizontal curve data in order to better identify and prioritize roads that are high-risk, Priority four
would create a two-phase project with the first phase being a planning project to collect data and categorize
road segments, allowing for a systematic approach to improve safety County wide, The second phase would
be an action phase where the County uses collected data to implement safety measures on road segments
identified as high-risk in phase '1,
ESTIMATED PROJ ECT COST:
o Pfiase 1 -$150,000
o Phase 2'$300,000
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lntroduction
The 2023 Kittitas County Road Safety Plan is a comprehensive program of safety improvements aimed at reducing
all collisions, but specifically fatalities and serious injury accidents across the entire county road network, This safety
improvement program was developed using a strategy similar to the Washington State Strategic Highway Safety
Plan: Target Zero 2019, in which crash data is analyzed to identify accident trends and contributing factors, and then
sites within the road system are prioritized using a risk-based ranking system. Safety improvement projects are then
developed to target specific locations and systematic improvements that provide the greatest benefit to the traveling
public by preventing potential fatal and serious injury accidents.
Due to the sporadic nature of crashes on rural county roads, it can be difficult to determine trends using past data
alone to choose locations for improvements. However, past crash data can be used to predict future crashes by
evaluating the contributing factors and targeting improvements for roads with similar characteristics. As a result,
Kittitas County has decided to utilize this strategy to allow for a proactive approach that benefits more locations
throughout the entire county road system and is more cost effective than only focusing on past crash locations,
Data Analysis
Data used for this evaluation was provided by Washington State Department of Transportation (WSDOT). The data
includes detailed information about crashes on Kittitas County roads from 2017 to 2021, including a comparison of
how Kittitas County's roads to other public roads in the state, detailed in Table 1. Although overall, fatal and serious
injury collisions occur at a similar rate to other public roads within the state, Kittitas County is committed to reducing
these types of collisions and strives to collaboratively achieve the statewide goal of zero deaths and serious inju1es
on Washington's roadways by 2030. The Kittitas County Road Safety Plan focuses on identifying cost efficient safety
improvement projects that offer substantial safety benefits countywide and reduce potential fatal and serious injury
collisions along Kittitas County's roadway network.
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Table 1. Types of collisions, number of crashes and percent of crashes for Kittitas County, all counties-county maintained roads,
and all public roads.
*lncludes fatal and non-fatal
*lncludes serious and non-serious.
The 2017 - 2021 WSDOT provided collision data was further evaluated to determine the predominant crash types,
contributing factors, and specific locations, As shown in Table 2 below, the predominant causes of fatal and serious
injury collisions in Kittitas County are "hitting a fixed object" and "overturning." Crashes involving fixed-object hazards,
or non-traversable roadside slopes within clear zone accounted for 44.800/o of allfatal and serious injury collisions,
Additionally, 20.700/0 of the fatal and serious injury collisions were caused by vehicles overturning. Unprotected
roadside slopes steeper than 3Horizontal:lVertical are considered non{raversable and contribute to overturning
accidents. The predominant conditions where fatal and serious injury collisions occurred included higher speed
roadways with low lighting conditions, and where roadway curvature was a factor, This accident data seems
consistent for a county like Kittitas where most of the roadway network is rural without lighting features.
Accidents tend to be more severe when speeds are higher and where low light conditions hinder driver acuity,
especially in horizontal curves where drivers are more likely to leave the roadway. Non-intersection related collisions
accounted for 72.400/o of the fatal and serious injury collisions, although a large proportion of total accidents (non-
injury, serious injury, and fatal) occurred at intersections and main corridors leading to potential for more serious
accidents at these locations. For the fatal and serious injury collisions accident report details please see Appendix A,
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Type of Collision
Kittitas County AllCounties-Co.
Maintained Roads
AllPuhlic Roads
(Washington State)
Number of
Grashes
Percent of
Crashes
Number of
Grashes
Percent of
Crashes
Number of
Crashes
Percent of
Grashes
Number of Fatal Collisions 4 13.80%696 23.80Yo 2,655 20.300/0
Number of Serious lniury Colllsions 25 86.200/o 2,232 76.20%10,396 79.70T0
Number of Alcohol-Related Collisions B 27.600/0 591 20.200/o 2,723 20.90Vo
Total Number of Fatalities 4 729 2,863
Total Number of Collisions*654 69,1 98 538,366
Total Number of lniuries**245 30,1 00 212,646
Table 2. crash data for fatal and serious injury collision by jurisdiction and collision type.
Risk-Based Prioritization Methodology
Run-off the road crashes have been identified as the predominant collision type in Kittitas County and are occurring
at a disproportionately high rate on specific conidors as compared to other public roads in the state as shown in the
crash data provided by WSDOT for 2017-2021, reflected in Table 2. As a result, this plan will focus on roadside
safety improvements to reduce the severity and number of accidents on Kittitas County roads where it is most likely
that run-off the road crashes will occur.
From a safety perspective, the ideal roadway is straight with roadsides that are flat and unobstructed by hazards.
Straight roadways eliminate the need for drivers to navigate curves, reducing the chances of running off the road.
Providing the recommended clear zone and roadside slopes allows drivers to safely recover control of a vehicle in
the event they do leave the roadway and helps ensure fixed-object hazards do not cause fatal or serious injury
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2017 through 2021 Crash Data
Fatal/Serious lnjury Collision Types and Conditions
Type of Collision
(Run.off the Road)
Kttitas County AllCounties-Co.
Maintained Roads
AllPublic Roads
(Washington State)
Number
of
Crashes
Percent
of
Crashes
Number
of
Crashes
Percent
of
Crashes
Number
of
Crashes
Percent of
Crashes
Hit Fixed Obiect - Roadwav Ditch 4 30.80%208 16.60%442 12.20Y0
Hit Fixed Obiect - Tree/Stump (Stationarv)3 23.100/o 293 23.40Y0 654 18.00%
Hit Fixed Obiect - Fence 1 7.7010 80 6.400/o 181 5.00%
Hit Fixed Obiect - Earth Bank 1 7.70o/o 139 11.10T0 319 8.80%
Hit Fixed Obiect - Over Embankment 1 7.70T0 91 7.30Y0 250 6.90%
Hit Fixed Obiect - Boulder (Stationarv)I 7.700/o 31 2.500/o 59 1.60Y0
Hit Fixed Obiect - Utilitv Box I 7.70%8 0.60%24 0.70Yo
Hit Fixed Obiect - Rock Bank 1 7.70o/o 7 0.60%Jb 1.00T0
Total Hit Fixed Object 13 44.80o/o 1,254 42.B}Yo 3.636 27.90T0
Total Overturn 6 20.700/o 259 8.80%858 6.60%
Light Condition - Dark, No Street Liohts 8 27.60To 823 28.100/"2,078 15.90%
Liqht Condition - Dawn I 3.40T0 66 2,30To 240 1.80%
Lisht Condition - Dusk 1 3.40Y0 108 3.700/o 424 3.20T0
Light Condition - Dark, Street Lishts On 0 0.00%264 9.00%3,128 24.00Y0
Total LiEht Condition 10 34.40%1.261 43.10V0 5,870 44.90Y0
Non-lntersection - Not Related 21 72.40o/o 1.960 66.90%7,435 57.00T0
Road Curvature - Horizontal Curve 10 34.500/o 1,046 35.700/"3,1 64 24.20Yo
Over Centerline 2 4.70o/o 103 2.80o/o 335 2.10Yo
Motorcycle 5 13.50%625 14.900/o 2,504 12.00T0
Posted Speed Limit at 50 mph 25 73.500/o 919 25.10Yo 1,884 10.80%
accidents. The aforementioned roadway geometry and clear recovery area is the goal in improving roadside safety
but is often cost prohibitive due to the geography of the area and is not supported by rural character or practical
design. ln cases where it is cost prohibitive to eliminate roadway curvature and create an unobstructed traversable
roadside, alternative improvements that may reduce the severity of an accident or alert a driver to a hazard should be
considered. This safety plan focuses on roadway segments and intersections where low-cost high benefit
countermeasures and improvements can be implemented. These countermeasures and improvements may include
improved or increased pavement markings, breakaway features on posts, guardrail deployment, bridge rail retrofits,
rumble strip installation, and signing and traffic delineation upgrades, all of which may be implemented to reduce fatal
and serious injury collisions.
Based on the crash data for 2017-2021,70.400/0 percent of the total crashes involved roads with an average daily
traffic (ADT) of 175 or more and with a speed limit of 35mph of higher. ln order to have the greatest potential impact
in reducing collisions, the county considered roads for evaluation and prioritization of safety improvements with the
following characteristics:
MINIMUM CRITERIA FOR INCLUDING ROAD SEGMENTS IN SAFETY PLAN:
. Paved; Asphalt Concrete Overlay (ACP), Hot Mix Asphalt (HMA), or Bituminous Surface Treatment
(BST),r ADT of '175 or more.o Posted speeds of 35 mph or more.o Collision within segment in the past five years.
The minimum criteria include the preliminary eligibility requirements as defined by the U,S, Department of
Transportation Federal Highway Administration's Highway (FHWA) Safety lmprovement Program (HSlp) as stated
under the 2023 County Safety Program: Call for Projects solicitation for grant funding. Additional scoring criteria has
been developed by Kittitas County Public Works Staff and used consistently throughout multiple years of safety
planning to provide scoring and prioritization continuity. The additional criteria include a heavier weighted score for
segments listed in the previous County safety plan, roadway curvature - horizontal curve, and collision seriousness
(injury, serious, or fatal). Kittitas County recognized in previous safety plans the need to collect clear zone data that
would reflect the current clear zone condition of all county roads. ln 2022, a clear zone inventory was conducted that
targeted known hazards such as shoulder width, side slope grade, and fixed objects in the clear zone of all county
road segments, The hazards found in each road segment were scored based off severity and later totaled to get a
final score per road segment. Each road segment was then ranked and given a weighted score that mirrored
previous scoring criteria of past safety plans. County road segments possessing the minimum criteria characteristics,
as well as the additional criteria characteristics, were evaluated and scored by the weighted method shown in Table
3. The complete list of resulting road segment prioritization is shown in Appendix B.
8
Table 3. Scoring criteria and weighted score values used in assessing road safety project priority for 2023. Higher scores
indicate a higher priority road segment and/or higher countermeasure needs.
Development of Road Segment Safety lmprovements
After roadway segments were prioritized using the risk-based scoring as described above, the results were reviewed,
and the list was shortened so the plan could focus on the segments that would see the most benefit from safety
improvements and eliminated erroneous results or locations reflecting outdated information.
Road segments with a score lower than 55 were removed from consideration in an attempt to break segments down
into higher priority rating and lower priority rating groups. Road segments that were within the scope of current
improvement projects or recently completed improvement projects were also removed. Each accident report was
examined for further details regarding the incident to further identify contributing factors, driver actions, alcohol or
drug influence, intersection related, and any countermeasures already in place, The list of candidate locations was
further reduced by eliminating roadway segments where accidents were alcohol or drug related with no hazard at the
site and segments where countermeasures were already in place and or where no countermeasures would have
prevented the accident, While these road segments are important to monitor, focus is given to other locations where
collisions due to deficiencies in the road structure can be addressed. The remaining roadway segments were then
evaluated for potential safety improvements and countermeasures,
Huntzinger Road has been identified as a safety need in the 2023 Safety Plan as well as in past safety plans. Crash
data shows several areas where road curvature; both vertical and horizontal, steep embankments, and no shoulder
9
Scoring Griteria and Weiqhted Scores
Item
Number Factors and Collision Types Score
1 OVERALL CRITERIA MET:
Meets minimum criteria and was included in previous localsafety plan 20
Meets minimum criteria but not included in previous local safety plan 10
Does not meet minimum criteria and was included in orevious local safetv olan 5
2 Clear Zone lnventory (Shoulder Width, Side Slopes, Fixed Obiects)
90th Percentile of highest scored roads based on clear zone inventory 20
80th Percentile of hiqhest scored roads based on clear zone inventorv 10
70th Percentile of highest scored roads based on clear zone inventory 5
3 Roadway Curvature - Horizontal Gurve
Over 50% of the road is in a horizontal curve 20
About 10% to 50% of the road is in a horizontal curve 't0
At least one section of the road is in a horizontal curve 5
4 ONE OR MORE FATAL OR SERIOUS INJURY COLLISION(S) - 2015 THROUGH 2019
Fatality (per personis)50 ea.
Serious lniury (per personis)40 ea,
5 INJURY (per person/s)'15 ea.
contribute to run-off-road accidents. lnjury and serious injury accidents have also contributed to the increase in
priority Huntzinger Road has experienced with the County. Segments along this road have been identified as areas
where safety improvements would make a large impact on reducing total accidents in the future. Huntzinger Road
has been split into a two-phase project that addresses approximately half the road at a time, starting with the higher
risk portion based on collected data,
Additionally, the County has re{hought its approach to addressing the need to improve'178 bridges and structures
that have been identified as having deficiencies. Past safety plans have also addressed this need, but due to limited
County forces, Kittitas County has been unable to provide a feasible solution to this problem, Recognizing the
importance of addressing the deficiencies in these structures, the County needs additional research, planning, and
engineering to come up with a feasible solution. Through this, the option for an outside consulting service to evaluate
and prioritize a systematic way to address these deficient structures would be possible.
P ri oritized Cost- Effective S afety I m proveme nt Projects
Road segment safety improvement identification used a combination of spot location and systematic approaches.
After improvements were identified, they were prioritized based on the potential for crash prevention and greatest
benefit, as supported by engineering judgement.
Kittitas County evaluated the scoring and road segment safety improvement results to find high risk, sizable benefit
countermeasures to group together as countywide safety projects that promptly provide the biggest benefit for the
most efficient cost. Examples of grouped projects in past safety plans include bridge rail improvements and
lntersection Conidor lmprovements. Bridges rated Code 1, Code 2 and Code 3 were broken into phases to create
more manageable projects for design and construction improvements. Such improvements include bringing bridges
up to cunent WSDOT standards through approach improvement, replacement of timber railings, or the addition of
railing for bridges with none. ln addition to this, lntersection Conidor improvements across the county would target
specific intersections that have insufficient or non-effective safety measures based on accident data and safety
studies. Kittitas County is currently 95% complete in its designs to improve previously targeted intersections and
corridors by improving clear zones, providing LED-enhanced signs, and taking increased visibility measures for high-
risk locations.
By focusing on similarities in the roads and their needs, priorities for the 2023 Kittitas County safety improvement
projects were formed to address a wider range of project locations for safety improvements, rather than specific road
focused projects. This allows the County to better reduce the possibility of fatalities and/or serious injuries across the
County, ln addition to this, locations with similar geographic vicinity were grouped together to provide efficient
contracting and create more cosleffective projects. A summary of the Safety lmprovement Projects can be found in
Table 4, followed by project details including preliminary scope, locations of the proposed work, and an estimated
10
cost for the improvements. Notes regarding the engineering judgment that affected project prioritization can be found
in the Executive Summary,
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Table 4. List of roads, characteristics, and accident severity rating system for project prioritization using criteria items and ratings from Table 3PRIORITYLEVEL1234TotalScore40210757515030lnjury090153045UFatal orSeriouslniurv0800000RoadwayCurvature20202020200ClearZonelnventory00202055OverallCriteria20202052020ADT818473818818312319SpeedLimit505050255050Pavedwidth242424242020EMP6.9910.744.885.144.353.08BMP5.146.992.704.883.080.5Road NameHUNIZINGER RD - PHASE 1HUNTZINGER RD - PHASE 1HUNTZINGER RD - PHASE 2HUNTZINGER RD - PHASE 2BRIDGEAND STRUCTURERESEARCHBRIDGE AND STRUCTUREPLANNINGBRIDGE AND STRUCTUREENGINEERINGDENMARK RDDENMARK RDHORIZONTAL CURVE PHASE 1 -PLANNINGHORIZONTAL CURVE PHASE 2.IMPLEMENTATIONRoadNumber750407504075040750406350163501L2
Priority 1: Huntzinger Road Safety lmprovements
a. Phase 1-MP 5.14 to llP 10.74
b. Phase 2.MP 2.701o MP 5.14
Huntzinger Road has several segments of road that scored high on the risk-based prioritization both in 2021 and in
2023. Although the accident data only reflects moderate hazards, the characteristics of the road show several areas
of curves; both vertical and horizontal, steep embankments, and no shoulder which are the largest contributing
factors to run-off-road accidents. Guardrail, signing and delineation improvements to this corridor are cost-prohibitive
so the county has prioritized the phases in order of mileposts. Milepost 5,14 to 6.99 had a total score above 55 in
2021, however dropped below this threshold to a total score of 40 in 2023. This may be due to the change in
methodology used to collect clear zone data and rate clear zone data per road segment in 2023, For this reason,
Kittitas County has opted to combine this road segment with phase 1 of the Huntzinger Road Safety lmprovements
priority. The Huntzinger Road Safety lmprovements project is a priority for Kittitas County because recreation
opportunities and new residence traffic are rapidly increasing along this roadway, Kittitas County would like to
acknowledge a current and continuing monitoring and evaluation stage for safety in these segments of Huntzinger
Rd.
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Priority 1: Huntzinqer Rd Safetv lmprovements
Phase 1 is between MP 5.14 to MP 10,74 where road segments have crashes involving injuries and severe
injuries, segments with sharp horizontal curves, vertical curves, steep embankments, very little to no
shoulder, and areas in need of guardrail, signs and/or delineation,
e ESTIMATED COST $1,580,700
Phase 2 is between I'llP 2.70 to MP 5,14 where road segments have several horizontal curves, steep
embankments, and no shoulder in places with minimal countermeasures in place.
o ESTIMATED COST $1,457,775
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Priority 2: Bridge and Structure lmprovement Project
Through ongoing efforts to identify hazards near and/or at bridges or structures countywide, 178
structures were identified to have deficiencies. These were codified into three types. Code 3 for no rail
or timber rail and 60 were identified. Code 2 for no approaches or non-crashworthy railing and 100 were
identified. Code 1 for rail that does not meet current AASHTO Manual for Assessing Safety Hardware
Standards (MASH) and 18 were identified. With the high quantity of deficient safety measures on
structures being countywide, an approach by maintenance district grouping was implemented to allow
for rail improvements in a series of projects. As further data such as survey was collected to provide
preliminary engineering options to implement these improvements to reduce the severity of crashes
that have or may occur at these structures, another element was identified. By adding rail to these
deficient structures, the county found that improvement would not be an improvement at all. Attaching
to a deficient structure would not meet current standards. lt would change the Code 3 to a Code 1 but
would not reduce the hazard. No protection for errant vehicles leaving the roadway would still be
present. The narrow structures, narrow roads, and no shoulder would create a larger project at each
site. Another approach is needed. A planning project that would allow for the research needed to create
a solution that would meet the Target Zero goals, meet standards, and be the most cost-effective
solution for the County.
With further research, planning and preliminary engineering, a project that would be successful for
these structures will be needed. As the county forces are limited, a project that allows for consultant
services to create a crashworthy and cost-effective solution is a priority for Kittitas County. Structure
widening or replacement projects to allow for improvements to meet current standards is an approach
that must be considered and planned for.
15
Prioritv 2: Bridqe and Structure lmprovement Proiects
ESTTMATED COST . $150,000.
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Priority 3: Denmark Road Safety lmprovements
Safety countermeasures and roadway improvements of a sharp corner with steep embankments at MP 3.57 would
aid to prevent run-off-road accidents on this specific road as it has a history of accidents at this location and was
identified in previous road safety plans as well as the six-year transportation improvement plan. The county included
multiple road segments to provide improvements to this entire roadway corridor, from MP 0,50 to MP 4,35 which
includes bundling structure crossings to the project for efficiency and cost-effective contract letting. This segment
includes five bridges with failing rails and/or no rails within maintenance district K: 79143-ob, 79144,79261-ob,
79262-ob,79351-ob, Alternatives to address these crossings may include structure widening, structure replacement
and the addition of barrier and guardrail. Recent improvements at this site include an extension of the culvert at MP
3.57 under Denmark Rd by about 1Sft and the addition of rock to prevent undercutting of road. The shoulders of the
roadway were also built up by approximately 2ft on the outside of the corner and 3ft on the inside of the corner.
Further countermeasures such as those mentioned in this section are needed as this work itself does not prevent
run-off-road events.
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ESTTMATED COST 92,704,488
Denmark Rd from MP 0.50 to MP 3.08 has several structures in need of adequate railing. Alternatives to
address these structures may include structure widening or structure replacement,
Denmark Rd from MP 3,08 to MP 4,35 has steep curves, both vertical and horizontal. The road narrows
greatly at the corner with steep embankments on both sides of the road, The countermeasures in place are
minimal and no rail is present at the corner,
Recent improvements include extension of the existing culvert and the addition of rock to prevent
undercutting of the roadway and shoulder buildup.
Denmark Rd includes five bridges rated as Code 3 (see Priority Two in this plan). Bridge lDs are: 7g143-ob,
7 91 44, 7 9261 -ob, 7 9262-ob, 7935 1 -ob.
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Priority 4: Gounty-wide Horizontal Curvature Plan
Roads that include horizontal curves have been identified as high risk by Kittitas County in both the 2023 safety plan,
as well as past safety plans. To better prevent future fatal and serious injury accidents, Kittitas County would greatly
benefit from future projects that utilizes horizontal curve data to identify roads in need of crash prevention measures.
Through various instruments and equipment to collect data, Kittitas County can implement projects such as advisory
speeds, LED chevrons/arrows, and additional Carsonite safety posts to prevent future fatal and serious injuries on
the road system. Although it has a lower priority than other projects, it is a low-cost proposal that could also reduce
the cost offuture projects.
19
Prioritv 4: Countv-wide Horizontal Curvature Plan
ESTIMATED COST:
Phase 1: Planning - $150,000
Phase 2: lmplementation - $300,000
ROAD CURVATURE VICINITY MAP
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Road segments scored by horizontal curve severity to identify potential locations for
countermeasures. Road segments were then ranked highest to lowest based off score
Scoring based off Table 3: Scoring Criteria and Weighted Score.
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References
Arnold Jr., E.D. and Lantz Jr., K,E., Evaluation of best practices in traffic operations and safety: Phase 1: Flashing
LED stop sign and opticalspeed bars. Virginia Transportation Research Council. 2007.
Chandler, B., Grey means go: Colorblindness in transportation, lnstitute of Transportation Engineers . March 2021,
Davis, G,A., Hourdos, J., Xiong, H,, Estimating the crash reduction and vehicle dynamics effects of flashing LED stop
sig ns. M in nesota Department of Transport ation. 201 4.
Gates TJ, Carlson PJ, Hawkins HG, Field evaluations of warning and regulatory signs with enhanced conspicuity
properties. Transportation Research Record. 2004.
Kittitas County Public Works Department. Kittitas County Road Safety Plan. 2023
23
List of Appendices
Appendix A:
Kittitas County Collision DaIa, 2017 -2021
Appendix B:
Road Segment Scoring and Project Prioritization
24
Appendix A
Kittitas Cou nty Collision Data 2017.2021
25
Table '1 . Fatal and serious injury accidents in Kittitas County, 2017 -2021 with accident and roadway details.U - Underage DriverORV - Off Road VehicleA/D - Alcohol and/or Drug RelatedP - Primitive Road| - lcy Conditionsr-=tooCL(t)Eo@oo-FATAL COLLISIONS505050(n50SERIOUS INJURY COLLISIONS355050505035505050503550355050505050Fo543863154483574371 656416632972596079911824734731 876963418835608343943738511251586==oEo6a-4024zo242234zo4024aal424242426zl283034222830G.!to6d6-ooooo=(\.o.gocootl,oe'oeC'cor..9oQ'2osr-c=Go-!oos-J6oc.etsoofIoo.croPedesfianOher Moving VehicleBicyclistFenceFenceOther Moving VehicleOher Moving VehicleCulvert and DitchBoulderBoulderUtility Pole/GaurdrailTree/Stum pRoaduay DitchTree/SfumpOher Moving VehicleOver EmbankmentEarh EmbankmenVDitch, Gate, FenceOther Movinq VehicleRoadway DitchRock Bank and Gaurdrailc.(t(l,goEox.=-oo(L3=2.203.142.367.3413.250.982.425.381.021.940.002.719.009.003.09'10.550.8198.480.562.695635.5738.6022.50>c;=CE.=GipCanyon RdCove RdKittitas HwyThorp Hwy NrUPPer Badqer Pocket Rd oRVBrick RdBullfroq RdCanyon RdCooke Canyon Rd oRVFairview RdGame Farm RdHungry Junction RdHunLinger RdHunZinqer RdKittitas HwyManastash RdlParke Creek RdSalmon La Sac RdUmptanum RdUpper Badger Pocket RdUpper Badger Pocket RdVantaqe HwyVantage HwyVantaqe Hwyo(Eo3130t20202t2t20206t27t201712t14t20199t12t201910t15t20218t15t20171t7 t20198t15t20205t26t201910t15t20219t19t20219t17 t20209t18t20203t15t201711t5t201910t28t20217t17t20216t21t20201t12t20194t6t20205126t20196nn0207t12t2020o,oEz,oo-oEEMBB52EA1 51 63s17-06144E99381 1E959762E878842E701962E88061 0EA56772E924190EB7BB42E877943EA65381EA65382s17-02108E981438E884619E851357E 42626E913398EM7B47E9241 90387490 1EA5030926
Figure 1. All vehicle accidents reported on Kittitas County roads, and injure severity, 2017 -2021Fodaftc n(l.Ekt b a6p triF h ;y dbr bnm9r' rr$t tm It Gr0u tr tct&t nrtfrt[trdircd b rdr rfot, rfritr, a{trrf!, k, rdE-/+)(rte+O/lIIili..L.aaft--,lt{i-|+.-{ _a..l0 2.5 5 t0 HtbslrlrlKittitas County/tll InJury CollisionsOn Cainty Roadwa),s,20t7-202tIniury TW€ by ser/€rity* ratatC Susp€cH Serious lnjuryI lsgecteo ltfor tnltryI nociUetniuryI no np'yi('tiil4 Cosnty GlsI27
Table 2. Total number of accidents per road (County maintained roads only), 2017-2021
Road Name
Number of
Accidents
Road Name
Number of
Accidents
Road Name
Number of
Accidents
1 st St (Thorp)
AirportRd (Cle Elum)
Anderson Rd
Badger Pocket Rd
Ballard Hill Rd
Bender Rd
Berry Rd
Bowers Rd
Brick Mill Rd
Brick Rd
Brovrrlr Rd
Bullfrog Rd
Burke Rd
Bynum Rd
Cabin Creek Rd
Canyon Rd
Casassa Rd
Carek Rd
Caribou Rd
Cascade PIace Rd
Christensen Rd
Cleman Rd
Clerf Rd
Colockum Rd
Cooke Canyon Rd
Cove Rd
Denmark Rd
Dry Creek Rd
Fairview Rd
Faust Rd
Ferguson Rd Nortr
Fourh Parallel Rd
Fowler Creek Rd
Game Farm Rd
Gladmar Rd
Golf Course Rd
Hannah Rd
Hanson Rd
Hemingsbn Rd
Hungry Junction Rd
1
2
1
4
1
R
2
I
11
0
2
13
1
1
14
U
1
2
I
1
E
3
4
b
6
2
7
1
I
2
1
5
1
1
U
10
1
7
Hunbr Rd
HunLinger Rd
Hyak Drive East
Kachess Lake Rd
Kaynor Rd
Killmore Rd
Kittitas Hwy
Koftnan Rd
Lannigan Springs Rd
Liberty Rd
Look Rd
Lovrer Green Canyon Rd
Lourer Peoh Point Rd
Lyons Rd
Main Sfeet (Vantage)
Manastash Rd
Middle Fork Teanaway Rd
Moe Rd
Mohar Rd
Morrison Rd
Mt Daniels Dr
Naneum Rd
Nelson Dairy Rd
Nelson Siding Rd
No. 6 Rd
N0.81 Rd
Parke Creek Rd
Pasco Rd
Passmore Rd
Payne Rd
Pays Rd
Pfenning Rd
Rader Rd
Railroad St
Recreation Dr
Reecer Creek Rd
Riverbotom Rd
Robbins Rd
Robinson Canyon Rd
Salmon La Sac Rd
1
15
1
2
1
1
45
I
1
1
7
2
3
3
2
13
?
I
2
3
1
0
2
7
24
A
1
1
I
1
1
3
I
17
2
4
o
I
Sanders Rd
Sisters Rd
Smihson Rd
Snoqualmie Dr
Sorenson Rd
Sparks Rd
Sfande Re
Sunlight Drive
Taneum Rd East
Taneum Rd West
Taylor Rd
Teanaway Rd
Thomas Rd
Thorp Cemetary Rd
Thorp Hury North
Thorp Hwy Soutr
Thorp Prairie Rd
Thrall Rd
Tipton Rd
Tjossem Rd
Umptanum Rd
Upper Badger Pocket Rd
Upper Peoh Point Rd
Vanderbilt Rd
Venture Rd
Wabon Cutoff Rd
West Fork Teanaway Rd
Wesbide Rd
White Pine Dr
Wibon Creek Rd
8
2
3
2
I
2
1
1
2
I
I
13
4
4
'16
8
18
I
12
19
14
17
1
1
1
1
17
I
20
>10 and <50 accidenb
>1,() nt;t;itjr:ttti:
28
Appendix B
Road Segment Scoring Results
29
Table 1. County road segments analyzed and scored by prioritization criteria, highest to lowest.INJURY15090120151204545'105bU9030bU909045lcbU30603030306015IJtc3045303030IJ45453000FATAL ORSERIOUSINJURY5080409004040040040000405004004040Ln0404000000004000005050ROADWAYCURVATURE020200520E65202000'102020500055E20202010100200'1000000CLEARZCINEINVENTORYSCORE00020010IU000010000000500000020anzu020200020001000OVERALLCRITERIA2020ltl202020IU2020tt]20202020102020202020lu2020202020202010202010202020201010# oF colLtstoNIN LAST 5YEARS216E1446o5112422EJ1036103212483242I42176141SURFACETYPEBSTBSTBSTBSTBSTBSTBSTBSTBSTACPBSTBSTBSTBSTBSTBSTBSTBSTBSTACPBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTACPBSTBSTBSTBSTBSTACPBSTADT5448473835437457496343938sl2833122041 66573ltl1342756357340660832262329718218767311259tzcl10468188181 1695168856341356123t?Eo11766205438433SPEEDLIMIT50503550505050505050505050505035355050505050505050255050505035355050505050TOTALWIDTH28243022282228282828202828242834zl402428282430ld24242820202434lo2424224024EMP2.36010.74010.5905.6104.0801 1.0102.7305.5706.5605.1002.7004.350'1.2004.6302.6107.6902.0300.6901.2205.4702.8403.3602.5302.0409.6000.8104,8805.'1401.8404.8700.0900.7300.9801.4703.3s04.090'1.3002.9163.720BMP1.5201.7502.7302.7705.5801.2704.0805.5703.5803.0800.0003.1200.8106.7930.7200.5001.1203.0201.7402.6402.0270.0007.5600.0002.7004.8801.3404.1000.0000.1 100,5500.8401.3602.5500.5702.1703.1 40ROAD NAMEKITTITAS HWYHUNTZINGER RDSALMON LA SAC RDUPPER BADGER POCKET RDVANTAGE HWYMANASTASH RDUPPER BADGER POCKET RDVANTAGE HWYVANTAGE HWYNO.6 RDBULLFROG RDDENMARK RDHUNGRY JUNCTION RDTJOSSEM RDPARKE CREEK RDTHORP HWY NORTHBULLFROG RDUMPTANUM RDBRICK RDCANYON RDHUNGRYJUNCTION RDKITTITAS HWYVANTAGECOOKE CANYON RDVANTAGE HWYHANSON RDHUNTZINGER RDHUNTZINGER RDLOOK RDBRICK MILL RDROBINSON CANYON RDTEANAWAY RDBRICK RDLIBERTY RDMANASTASH RDWLSON CREEK RDBADGER POCKET RDCANYON RDCOVE RDROAD #9695175040215606475694001953016475694001940019620092275635013151096865693709541792275969374060096076315109695194001438839400195600750407504040761412715451 0285004060038350953019412668910960769ss0130
TOTALSCORE606060606060bU5555555555555555555555INJURY0303030301530301F45153015301530300FATAL ORSERIOUSINJURY40000000000000000040ROADWAYCURVATURE101001052002002002020205CLEARZONEINVENTORYSCORE00100520050005000000OVERALLCRITERIA1020202020201020201020202020202010# oF collrstoNIN LAST 5YEARS4I483222I3)4I1214SURFACETYPEBSTACPBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTBSTHI\,,IAADT6078176428'102284596I too300710'18762411371276toJ'10331 031701586SPEEDLIMIT50J55050505035355050355050503550TOTALWIDTH2228202826lo2028222020to28343438EMP1.9403.0401.2003.3501.1001.2703.9402.7302.6804,8700,5501.9701.5103.5101,3903.1603.66023.360BMP0.9801.8200.9601.7400.1500.0002.1400.4141.8'103.8200.0001.5340.0000.0000.9800.0003,1 6021.250ROAD NAMEFAIRVIEW RDNELSON SIDING RDROBINSON CANYON RDTHORP HWY SOUTHTHRALL RDUPPER BADGER POCKET RDWESTSIDE RDAIRPORT RD (CLE ELUI\,I)BROWN RDKITTITAS HWYMOHAR RDPFENNING RDTHOI\,lAS RDTHORP PRAIRIE RDTJOSSEI/I RDUPPER PEOH POINT RDUPPER PEOH POINT RDVANTAGE HWYROAD #63500230305451095417967516475622710230109561 196951223506976043132527709686524610246109400131