HomeMy WebLinkAboutPublic Hearing_Thrall Road Speed ReductionKITTITAS COUNTY
DEPARTMENT OF PUBLIC WORKS
AGENDA DATE:
ACTION REQUESTED:
AGENDA STAFF REPORT
November 17, 2020
Conduct a Public Hearing to consider a speed
reduction on Thrall Road and amend Kittitas
County Code Chapter 10.08.020 Speed Limits.
BACKGROUND: Kittitas County Department of Public Works
received a request on September 25, 2020 to
conduct a speed study and consider a reduction of
speed on Thrall Road between No. 6 Road and Moe
Road (50 MPH to 35 MPH). The speed study was
conducted, and staff is now presenting the findings
for consideration.
INTERACTION: Public Works
RECOMMENDATION: Hold a Public Hearing on November 17, 2020 at
2:00 pm to consider a speed reduction on Thrall
road and amend Kittitas County Code Section
10.08.020 Speed Limits and receive public
testimony.
HANDLING: Return one signed Ordinance to Public Works
ATTACHMENTS: Engineer's Report; Ordinance
LEAD STAFF: Joshua Fredrickson, County Engineer
KITTITAS COUNTY
DEPARTMENT OF PUBLIC WORKS
PUBLIC WORKS — BOARD OF COUNTY COMMISSIONERS
ENGINEER'S REPORT — SPEED REDUCTION REQUEST FOR THRALL ROAD
(MP 0.05 TO MP 1.10)
PUBLIC HEARING DATE: November 17, 2020 2:00 PM Local Time
ACTION REQUESTED: Maintain the existing 50 Miles per Hour Speed Limit
LEAD STAFF: Joshua Fredrickson, County Engineer.
RECOMMENDATION:
Maintain the existing 50 miles per hour speed limit on Thrall Road MP 0.05 to MP 1.10.
BACKGROUND:
The State of Washington sets the maximum speed limit for county roads at Revised Code of
Washington Chapter 46.61.400.
The State of Washington authorizes local authorities to establish or alter maximum speed limits at
Revised Code of Washington Chapter 46.61.415.
Kittitas County Code manages 35 miles per hour speed limited roads at Chapter 10.08.020.
Thrall Road (MP 0.05 to MP 1.10) posted speed limit is currently 50 miles per hour.
Kittitas County utilizes roadway segments as the basis of setting service levels. Service levels are
used to identify congestion and impacts to roadway surface condition along with assigning risk
associated with roadway usage. We assign alphabetic designations: A, B, C, D and F. We require
mitigations improving roadways segments that drop below service level C. A represents free flowing
traffic with no delays in the road segment. Service Level F represents a traffic jam.
Public Works utilizes national engineering standards when evaluating speed limits on County Roads.
The standard engineering practice is to collect vehicle speed data and process the data determining the
85d' percentile speed. Traffic engineers rely on the 85th percentile rule to help establish speed limits
on non -local streets. Typically, the speed limit is set to the speed that separates the bottom 85% of
vehicle speeds from the top 15%. Statistically, the 85th percentile speed is slightly greater than the
speed that is one standard deviation above the mean of a normal distribution. This is the assumed
national standard representing most drivers negotiating the roadway.
Public Works designs roadways pursuant to national standards (American Association of State
Highway and Transportation Officials) for: horizontal and vertical curves and associated roadway
geometrics.
Page 1 of 4
PUBLIC WORKS BOARD OF COUNTY COMMISSIONERS ENGINEER'S REPORT
On September 25, 2020 Public Works (PW) received a request to study Thrall Road speeds between
No. 6 Road and Moe Road (Milepoints 0.05 and 1.10) and to lower the speed limit from 50 miles per
hour to 35 miles per hour (EXHIBIT 1). Responding to the request, PW set speed counters out for a
one-week period (10/01 — 10/08/2020). Speed study results are provided as EXHIBIT 2. In addition
to collecting speed data, PW dispatched our staff to evaluate vertical and horizontal curves in the road
segment for conformance to national design standards. The petition cites increased residential
development and agricultural use for the increased traffic volume, also the concern of crashes as being
the reasons for speed concern.
DISCUSSION:
The segment of Thrall Road between No. 6 Road and Moe Road includes two horizontal curves.
Public Works' evaluation of roadway geometrics (horizontal and vertical curves) affirms appropriate
design conformance to national standards of engineering practice (50 MPH design speed) for the
western curve. The radius and cross slope combination on the eastern curve match the design criteria
for a 45 mph curve. The crash reports did not indicate the curve geometry to have been a factor. 85'
percentile speeds in both directions (east and west) are higher than current posted 50 MPH speed limit,
indicating driver comfort with existing road conditions. Since 2015 there have been nine recorded
vehicle crashes in this road section, with the majority occurring in 2017 and 2018. Of the nine none
were cited for driving over the posted speed limit. Four were related to snow and ice conditions. One
was related to an insecure load and one related to a deer impact. The three remaining were related to
distracted driving. Crash data does not correlate to the posted speed. There are five approaches within
this section of roadway. Thrall Road is similar to many county roads, narrow lanes with a minimal
shoulder. Urbanization and increased agriculture activity have resulted in higher traffic volumes.
Thrall Road is operating within the Level of Service standard for rural road operations. Our most
recent twenty-year transportation plan does not forecast Thrall Road as breaking accepted levels of
service in the next twenty years.
FISCAL IMPACTS:
Posting the new 35 MPH speed signs is expected to cost in the range of $2,000. Public Works
budgets for this activity annually in our road maintenance budget.
ATTACHMENTS:
EXHIBIT l: Request for speed reduction
EXHIBIT 2: Speed study results
Page 2 of 4
PUBLIC WORKS BOARD OF COUNTY COMMISSIONERS ENGINEER'S REPORT
EXHIBIT 1: REQUEST FOR SPEED STUDY
Page 3 of 4
PUBLIC WORKS BOARD OF COUNTY CONMSSIONERS ENGINEER'S REPORT
BULL BROTHERS FARMS, INC.
25, 2020
Candle Leader
Administrative Assistant
Ktttas County
Department of Public Works
411 North Rft. Suite 1
Ellensburg, WA 98926
SEP 2' 2020
KITTITAS COUNTY
DEPT OF PUBLIC WORKS
Dear Candie,
I am writing to you to request that the Department of Public Works perform a traffic
speed study on Thrall Road from the intersection of No. 6 Road to the Intersection
at tube Road. The current speed limit is fifty miles per hour. I am requesting that it
be lowered to thirty five miles per hour.
I have farmed along that portion of Thrall Road for a period of over forty years. As
the population has increased and more citizens have moved to the Badger Packet
area the number of vehicles have greatly increased. The orchard business has also
had the effect of increasing the number of vehicles that travel that stretch of Thrall
Road.
In the last few years there have been several accidents in the area next to my
property Most have been vehicles traveling at excessive speeds and distractive
driving behavior that have caused them to depart from the roadway.
Operating farm equipment along that section of road has become very challenging,
and quite dangerous.
I am also requesting that a radar speed unit be placed for a reasonable length of
time along the East bound lane ofligall Road adjacent to my farm shop building
just prior to the left curve in the roadway. 1 am attaching a depiction of the location.
Thank you in advance for your help in this matter.
Sincerely,
, 6—Ll—
Thomas Bull
70
rz.
EXHIBIT 2: SPEED STUDY RESULTS
Page 4 of 4
PUBLIC WORKS BOARD OF COUNTY COMMISSIONERS ENGINEER'S REPORT
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ROAD NAME THRALL RD
MILEPOST 0.76
CROSS STREET 0.28 W OF MOE RD
Volume Grand Totals
Average Hourly Volumes
Site: 96751
ThUrsday, 10/1/2020 8:15 AM -
Thursday, 10/8/2020 8:15 AM
Average Daily Traffic (ADT) 825.3 834.2 1659.5
Volume Totals
EASTBOUND WESTBOUND Combined
5776 5853 11629
49.7% 50.3%
EASTBOUND
WESTBOUND
Combined
12:00 AM
2.4
1.0
3.4
1:00 AM
1.0
1.0
2.0
2:00 AM
1.1
0.6
1.7
3:00 AM
1.9
2.3
4.1
4:00 AM
0.7
7.3
8,0
5:00 AM
11.1
18.4
29.6
6:00 AM
71.9
34.7
106.6
7:00 AM
27.4
56.9
84.3
8:00 AM
40.0
60.5
100.5
5:00 AM
44.6
56.4
103.0
10:00 AM
49.7
51.3
101.0
11:00 AM
50.3
;, . 56.1
106.4
12:00 PM
60.6
59.6
119.6
1:00 Phi
65.9
6 3. 3
129.1
2:00 PM
58.4
65.9
124.3
3:00 PM
61,o .
.0.4
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4:00 PM
66.0
71.1.
137.1
5:00."ON
76.7
62.6
139.3
6.00 PM
52.0
51.6
103.6
7:0.0 PM
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26..6
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8:00 PM
21.3
11.1
32.4
9:00 PIM
12.6..
5.3.
10:00 PM
10.0.
3.3
13.3
Average Daily Traffic (ADT) 825.3 834.2 1659.5
Volume Totals
EASTBOUND WESTBOUND Combined
5776 5853 11629
49.7% 50.3%
BOARD OF COUNTY COMMISSIONERS
COUNTY OF HITTITAS
STATE OF WASHINGTON
ORDINANCE NO. 2020 -
ESTABLISHMENT OF A SPEED ZONE AND THE PLACEMENT OF SPEED LIMIT
SIGNS ON THRALL ROAD AND AMENDING SECTION 10.08.020 SPEED LIMITS OF
HITTITAS COUNTY CODE
WHEREAS: The Department of Public Works recently conducted a speed study of Thrall Road
(MP 0.05 to MP 1.10); and
WHEREAS: The Board of Kittitas County Commissioners did hold a public hearing on Tuesday,
November 17, 2020 at 2:00 pm to hear public testimony regarding the establishment
of a 35 mile per hour (MPH) speed zone and placement of speed limit signs on the
above listed road; and
WHEREAS: The Kittitas County Board of County Commissioners have determined that 35 mile
per hour speed limit is appropriate speed limit for Thrall Road from MP 0.05 to MP
1.10;
NOW, THEREFORE BE IT RESOLVED that the Kittitas County Board of County
Commissioners, after due deliberation and in the best interest of the public, does
hereby establish a 35 mph speed limit on Thrall Road at MP 0.05 to MP 1.10 and
authorizes the placement of speed limit signs at the above stated locations and
amends Kittitas County Code Section 10.08.020 as indicated in Exhibit A.
BE IT FURTHER ORDAINED that this ordinance will become effective upon the installation of
the appropriate signage.
DATED this 17th day of November 2020 at Ellensburg, Washington.
Attest:
❑ Clerk of the Board- Julie Kjorsvik
❑ Deputy Clerk of the Board- Mandy Buchholz
BOARD OF COUNTY COMMISSIONERS
KITTITAS COUNTY, WASHINGTON
Brett Wachsmith, Chairman
Laura Osiadacz, Vice -Chairman
Cory Wright, Commissioner
10.08.020 Thirty-five miles per hour.
The following roads or portions thereof shall have a maximum speed limit of thirty-five miles per
hour:
• Airport Road (Cle Elum), entire road.
• Airport Road (Ellensburg), from Ellensburg city limits to Bowers Road.
• Anderson Road, from Umptanum Road to Ellensburg city limits.
• Ballard Hill Road, entire road.
• Bender Road, from Reecer Creek Road to Ellensburg city limits.
• Bettas Road, entire road.
• Bowers Road, from Reecer Creek Road to Airport Road.
• Brick Mill Road, from Naneum Road to Fairview Road.
• Brick Road, from milepost 0.624 to Sanders Rd.
• Brown Road, Hanson Road to Barnes Road intersection.
• Bull Road, from Ellensburg city limits south to cul de sac.
• Bullfrog Road, milepost 0.0, 1-90 to milepost .72.
• Cabin Creek Road, from Hiline Canal to end of Kittitas County portion, milepost
2.92.
• Caribou Road, entire road.
• Carroll Road, entire road.
• Cassasa Road, entire road.
• Chandler Road, entire road.
• Clarke Road, from US 97 to Lower Green Canyon Road.
• Cove Road, from Thorp Highway to Robinson Canyon Road.
• Durr Road, entire road.
• Dry Creek Road, from Ellensburg city limits to SR 97.
• Faust Road, from MP 0.00 to Bridge #88212.
• Game Farm Road, entire road.
• Gladmar Road, entire road.
• Golf Course Road, entire road.
• Goodwin Road, First Street to end of road.
• Hanson Road, from Cove Road, west to end of county road.
• Hidden Valley Road, from SR 970 to Emerick Road.
• Horlick Road, entire road.
• Horvatt Road, from SR 903 to Roslyn city limits.
• Hundley Road, entire road.
• Hungry Junction Road from milepost 1.15 to milepost 1.70.
• Judge Ronald Road, entire road.
• Kachess Lake Road, entire road.
• Kittitas Highway, 450 feet west of Fairview Road, milepost 5.30, to 800 feet west of
Kittitas City Limits, milepost 5.49.
• Kittitas Highway, from milepost 1.03 to milepost 1.34.
• Klocke Road, entire road.
• Lake Cle Elum Dam Road, entire road.
• Lambert Road, entire road.
• Ley Road, Swauk Prairie Road to milepost 0.70.
• Liberty Road, from SR 97 to milepost 1.48.
• Lower Peoh Point Road, entire road.
• Main Street (Vantage), from 1-90 Interchange to Recreation Drive.
• Manastash Road from Cove Road at milepost 3.56 to end of road.
• Markovich Road, entire road.
• Masterson Road, entire road.
• McCullough Road, entire road.
• McManamy Cut-off, entire road.
• McManamy Road, entire road.
• Mohar Road, entire road.
• Naneum Road, from Vantage Highway to Watson Road.
• Nelson Siding Road, entire road.
• No. 81 Road, from Alpine Drive to Vantage Highway.
• O'Neil Road, entire road.
• Pays Road, entire road.
• Pfenning Road, from Vantage Highway to Game Farm Road.
• Railroad Street, from Cabin Creek Road, east to end of road.
• Railroad Street, from west 190 overpass east to Bridge #03112 milepost .83 (Easton).
• Recreation Drive (Vantage), entire road.
• Reecer Creek Road, from University Way to Bowers Road.
• Ringer Loop, entire road.
• Riverbottom Road, from milepost 0.35 to milepost 3.06 (Umptanum Road).
• Salmon La Sac Road, from SR 903 to end.
• Sanders Road, entire road.
• Sisters Road, entire road.
• Sparks Road, entire road.
• Storie Lane, entire road.
• Strande Road, from Barnes Road to Manastash Road.
• Susan Road, entire road.
• Swauk Prairie Road, entire road.
• Talmadge Road, entire road.
• Taneum Road, East, from Thorp Highway to milepost 1.00.
• Taneum Road, West, entire road.
• Thorp Highway, from milepost 5.16, 950 feet south of 1-90, to milepost 6.42 (First
Street, Thorp).
• Thorp Highway, milepost 6.90 to Taneum Road, East, milepost 7.69.
• Thrall Road. from No. 6 Road to Moe Road
• Tozer Road, entire road.
• Umptanum Road, from Ellensburg City Limits to milepost 0.75.
• Umptanum Road, from milepost 2.68 to milepost 9.03.
• Upper Peoh Point Road, entire road.
• Vantage Highway, from the Ellensburg city limits to 0.10 east of Pfenning Road.
• Watson Cutoff Road, entire road.
• West Sparks Road, entire road.
• Westside Road, from South Cle Elum City Limits to Golf Course Road.
• Wilson Creek Road, from Vantage Highway to Game Farm Road.
• Woodhouse Loop, entire road.
• Woods & Steele Road, entire road.
• Zrebiec Road, entire road.
(Ord. 2019-011, 2019; Ord. 2018-017 2018; Ord. 2017-008, 2017; Ord. 2017-003 2017; Ord. 2016-
018, 2016; Ord. 2016-015 2016; Ord. 2016-011 2016; Ord. 2015-008, 2015; Ord. 2014-016,
2014; Ord. 2014-003, 2014; Ord. 2013-007 2013; Ord. 2012-008, 2012; Ord. 2011-010 2011; Ord.
2011-008, 2011; Ord. 2007-31, 2007; Ord. 2007-15, 2007; Ord. 2006-52, 2006; Ord. 2006-45, 2006;
Ord. 2005-33, 2005; Ord. 2005-28, 2005; Ord. 2003-19, 2003; Ord. 97-15, 1997; Ord. 97-07, 1997; Ord.
9613, 1996; Ord. 96-11, 1996; Ord. 96-7, 1996; Ord. 95-12 (part), 1995; Ord. 95-11(A) (part), 1995;
Ord. 95-3, 1995; Ord. 94-37 (part), 1994; Ord. 94-34, 1994; Ord. 94-20 (part), 1994; Ord. 94-6, 1994;
Ord. 93-14, 1993; Ord. 93-11 (part), 1993; Ord. 92-21, 1992; Ord. 92-19 (part), 1992; Ord. 92-15 (part),
1992; Ord. 88-3, 1988; Ord. 87-3, 1987; Ord. 86-2 (part), 1986; Ord. 85-3 § 3 (part), 1985; Ord. 85-2
(part), 1985; Ord. 83-6 (part), 1983; Ord. 83-5, 1983; Ord. 83-4 (part), 1983; Ord. 82-11 (part), 1982;
Ord. 82-9 (part), 1982; Ord. 82-6,1982; Res. DPW77-81, 1981; Res. DPW -59-81, 1981; Res. DPW -75-
80, 1980; Res. DPW -71-80, 1980; Res. RD -105-79, 1979; Res. RD -39-79 (part), 1979; Res. RD -71-78,
1978; Res. RD -58-78, 1978; Res. RD -55-78, 1978; Res. RD -79-77, 1977; Res. RD -48-77,1977; Res. RD -
32 -77, 1977; Res. RD -47-75, 1976; Res. RD -85-75, 1975; Res. RD -84-75, 1975; Res. RD -61-75, 1975;
Res. RD -71-73 (part), 1971; Res. RD -473, 1973; Res. RD -46-71 (part), 1971).
Publisher's note: Added periods to the end of items to correct scrivener's errors in Ordinance 2014-003 and Ord.
2018-017.