2022-07-11-minutes-public-works-study-session

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KITTITAS COUNTY DEPARTMENT OF PUBLIC WORKS PUBLIC WORKS — BOARD OF COUNTY COMMISSIONERS STUDY SESSION STAFF REPORT STUDY SESSION DATE: TOPIC: ACTION REQUESTED: LEAD STAFF: Joshua Fredrickson July 11, 2022 Vanderbilt Road Speed Study Results Schedule a Public Hearing receiving the Engineer's Report on the Request for Speed Reduction RECOMMENDATION: Schedule a public hearing August 2, 2022, receiving the County Engineer's report on the request for speed reduction on Vanderbilt Road Road (MP 0.00 to MP 0.48) BRIEFING SUMMARY: • A resident on Vanderbilt Road requested a speed reduction on Vanderbilt Road (MP 0.00 to MP 0.48) on September 30, 2021 • The speed study was conducted on March 22, 2022, to March 31, 2022 • Speed study data collected at MP 0.16 • Average daily traffic (ADT) of 82 vehicles, with 16 trucks (20%) • ADT distribution is 49% southbound and 51% northbound • 85% speed at 38 Miles Per Hour (MPH) • One accident in the past five years BACKGROUND: Responding to a request received on September 30, 2021, to reduce the posted speed on Vanderbilt Road, Public Works deployed traffic data collectors March 22, 2022, and collected through March 31, 2022. Due to staffing changes, data processing and reporting was delayed. Traffic and speed data was collected at mile post 0.16. This road segment has 20 percent truck traffic within the average daily traffic distribution of vehicle size. Traffic at this location is split 49% southbound and 51% northbound. Overall 85`h percentile speed at this location is 38 MPH with directional speeds of 36 MPH southbound and 40 MPH northbound. DISCUSSION: 85`h percentile speeds show traffic is operating at a speed less than the current speed limit of 50 MPH. There are nine approaches along Vanderbilt Road, primarily serving residential uses. Surrounding land is also in agricultural production.