10-02-2017 Council Packet - Laserfiche WebLink

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Step 1: Request for intersection control evaluation This request can come from either a resident, the City Council, the Traffic Safety Committee, or from staff observation of a particular intersection. If a request is made from a resident, a signed petition of more than 80% of the households within a 300' radius of the intersection, must accompany the request. Step 2: Data collection This step in the procedure involves collecting the data necessary to evaluate the proposed intersection control. The data required for each phase is listed below. • Average Daily Traffic Volume data • Traffic speed by approach • Vehicle classification (number of trucks, etc.) • Pedestrian volumes crossing all approached during peak periods • Intersection topographic information • Detailed crash data • Detailed site visit viewing the intersection operations for the peak hours of a typical day Step 3: Initial evaluation An initial evaluation of the intersection should be completed to determine if a detailed intersection control study should be performed. This evaluation is something that can be applied with minimal data (i.e., ADT traffic volumes, accident history and roadway geometrics). This procedure is as follows: A. Minimum traffic volume: If the daily (ADT) traffic volume approaches the intersection on each leg adds up to more than 1,000 vehicles in a day, the intersection is a candidate for an intersection control study (EB+WB+NB+SB = 1000+) or, B. Accident history: If there are more than two reported crashes per year in the previous two years or, three accidents in the previous 12 month period, of a type that is correctable with stop sign control (i.e. right angle or turning in front of another vehicle), an intersection is a candidate for an intersection control study. If the intersection does not meet these requirements no further study will be completed without direction from the City’s Traffic Safety or City Council. A letter to the resident requesting the information, outlining the findings will be sent by the City Engineer. This letter will include the City’s policies for appeal of the engineer’s decision. Step 4: Intersection Control Study If the initial evaluation concludes that an intersection control study is necessary, the following procedures will be followed to determine which type of traffic control is required. A. Intersection operation analysis: This would involve analyzing the operation of the intersection using the current version of the Highway Capacity Manual to determine the Level of Service and potential delays on specific approaches. This analysis can be conducted for either a two-way or four-way stop sign controlled intersection.