4.4. SR 03-15-1999 - Laserfiche WebLink

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. . . alignment and station costs and less convenient passenger access to stations. Stop spacing for bus service is closer than other modes, every one to two blocks or 300 to 500 feet typically. Station spacing of one-quarter to one-half mile is comparable for Bus Rapid Transit, LRT, DMU and AGT; station spacing for Commuter Rail, Heavy Rail, and Monorail is typically wider, two to five miles or more. The primary environmental impact for all technologies requiring grade separation is visual intrusion; other impacts for all alternatives include traffic, noise and emissions. A more detailed evaluation of each technology is presented in the following sections. a. Bus Diesel Bus The primary advantages of diesel bus operation are low cost and high flexibility. · Buses generally operate over existing roadways and therefore do not require a significant additional investment in infrastructure. Capital costs are primarily limited to vehicles. · Routes can be flexible. Routing changes can be implemented, for all practical purposes, immediately. · Buses can serve a wide range of passenger demand and bus size can be adapted to passenger loads. Electric Trolley Bus Electric trolley buses offer a distinct advantage in acceleration and are efficient for routes characterized by steep grades and high frequencies. Electric trolley buses are more limited in their maneuverability than diesel buses. Trolley bus operation is quiet and non-polluting. However, electrification requires a significant investment and overhead wire at junctions can be perceived as visually intrusive. Bus stops are typically low cost and easily accessible since stop spacing is close. Buses along street and roadways are subject to traffic delays. Trolley bus maneuverability is limited and immediate route deviations are not possible. Trolley buses find their most appropriate use for heavily used frequently operating routes characterized by steep grades, not a characteristic of the Northstar Corridor study area. Diesel emissions create an environmental impact; however, justification of trolley buses for moderate ridership routes is unlikely. Utilization of alternative-fuel-powered standard buses poses a more feasible method to mitigate bus pollution impacts. Bus transit is ~ecommended for further study. Northstar Corridor Major Investment Study Conceptual Definition of Alternatives February 1999 III-9