Item 17 - Engineering and Traffic Survey for Speed Limits Updates

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• 20,079 average 24-hour volume • 1.11 mile segment The accident rate for this roadway segment is calculated as follows: Accident Rate = 17 x 101 20,079 x 365 x 1.11 x 3 0.70 accidents per million vehicle miles (A/MVM) The Average Expected Accident Rate for this roadway segment type is 1.20; thus, the calculated accident rate of 0.70 is below the expected rate for this example. The product of this task will be the summary table showing the following: • Street segment • Segment length (in miles) • ADT information • Number of accidents • Average Expected Accident Rate • Actual Accident Rate A sample of the accident summary table is provided in Appendix E. The final format for the accident summary table will be pre -approved by the City. Task 5 — Segment Spot Speed Analysis The speed survey data analyzed in Tasks 1 through 4 will be summarized in the Segment Spot Speed Summary Table. The summary will include the information per the City provided sample in the RFP. This table includes the recommended speed limit for the street segment based on the 85th percentile speed and any justifications for setting the speed limit lower than the recommended 851h percentile speed. At a minimum, this table will include the following: • Street Name • Street Segment • Existing Speed Limit • Recommended Speed Limit • 851h Percentile Speed • Mean Speed • 10 MPH Pace Range • Percent of Vehicles in Pace • Date of Survey • Reason for speed limit change from the 85th percentile speed A sample of the Segment Spot Speed Summary Table is provided in Appendix F. The final format will be will be pre -approved by the City. Task 6 — Preparation of Draft Report A report documenting the Engineering and Traffic Study will be submitted to the City for review. It will summarize the existing speed limits and the recommended changes to the speed limits (increase or decrease) in accordance with the requirements of Sections 627, 40802(b), 22357 and 22358 of the California Vehicle Code. AGA will also document any changes in the guidelines based on the 2014 California Manual for Setting Speed Limits (basis for the 2016 Engfncc Inc. Page 8