2007-11-14 CC Packet - Laserfiche WebLink

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Main Street corridor will provide overall satisfactory LOS results. Some individual movements at two intersections are expected to operate at LOS E or F. However, no additional mitigation is proposed because: · Relatively few vehicles are expected for those movements · A traffic signal at the Progress Road and Dupre Road intersections would not be warranted · Lower LOS results for side-street stop controlled movements are not uncommon · Progress Road traffic has the option of shifting to the signalized intersection at Main Street and Centerville Road Although overall satisfactory LOS are expected to be provided, safety improvements to the Main Street corridor are recommended. These improvements will retain the flexibility for different left turn phasing, allowing the signal to adapt to changing traffic flows and patterns. The changes will also improve the LOS for some individual movements. The alternative improvements recommended include: · Providing an exclusive northbound left turn lane at the intersection of Main Street and Centerville Road instead of an exclusive right turn lane · Adding a southbound left turn lane at the intersection of Main Street and Centerville Road · Adding a southbound right turn lane at the intersection of Main Street and Progress Road The results and recommendations for 2030 are similar with or without the proposed development. The exact timing for a traffic signal at the intersection of Main Street and Centerville Road will depend upon actual traffic conditions. The intersection and its volumes should be monitored to detennine the appropriate timing of installation and ensuring that a traffic signal system is wananted and j usti tied. 22. Vehicle-related air emissions Estimate the effect of the project's traffic generation on air quality, including carbon monoxide levels. Discuss the effect of traffic improvements or other mitigation measures on air quality impacts. Note: If the project involves 500 or more parking spaces, consult EA W Guidelines about whether a detailed air quality analysis is needed. According to the air quality impact analysis completed by SBP Associates, Inc. (see AttachmentJ), carbon monoxide (CO) levels are elevated near roadway intersections due to the emission of this pollutant from the vehicles idling and passing by the redevelopment area. The State of Minnesota has ambient CO standards that are designed to protect human health and the environment. The Standards are: 20