08-11-2003 Council Packet - Laserfiche WebLink

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Bonestroo Rosene Anderllk - St. i^aCn, MN - (651)636-1311 As shown in the table, this intersection is experiencing more crashes and more severe crashes than typical intersections of this type. Exceeding the averages could indicate a problem at the intersection. Sight Distance According the Mn/DOT road design manual, a passenger vehicle stopped on Willow Drive should be provided with 1,450 feet of sight distance to the east and to the west along CSAH 6. A profile of CSAH 6, based on the topography for the intersection area, was used to determine the existing sight distance. To the west, the si^t distance exceeds 1500 feet and meets the Mn/DOT standard. To the east on CSAH 6, the sight distance is approximately 750 feet, well short of the desired distance. Based upon the CSAH 6 profile and Mn/IX)T design standards, the sight distance to the east could be a potential problem for stopped vehicles on Willow Drive. Potential Intersection Improvements As identified in the previous section, the intersection of CSAH 6 and Willow Drive has three potential problems: • Higher than average crash experience • Less than standard sight distance to the east for stopped vehicles on Willow Drive • 95'*' percentile queue length beginning to encroach on the previous intersection of Willow Drive and Sbadowood Drive In addition, the p.m. peak hour capacity analysis shows the northbound and southbound approaches are close to falling into level of service E, which would be an unacceptable condition. Based on these potential problems, this intersection could benefit firom both capacity .md safely improvements. Capacity Improvements The capacity of the intersection could be improved through a different type of control and/or additional turning lanes on any or all approaches. To employ a different traffic control device, the traffic volumes at the intersection must meet certain thresholds, or warrants. Mn/DOT uses these warrants to provide the minimum guidelines for installation of either all-way stop control or traffic signal control. There are eight warrants for traffic signals and four warrants for all-way stop sign control. The vehicular volume warrants fur a traffic signal and all-way stop were first examined using the approach counts from Hennepin County. Under existing conditions, these volumes do cot satisfy the criteria for traffic signal warrants, but do satisfy the criteria for all-way stop control. Using the pea., period turning movement counts, the peak hour traffic pignal warrant and the all-way stop control warrant were both sahsfied. CSAH 6 & Willow Dr Intersection Review -5-City ofOrono * . • I f 1