pages: TransportationCommission/2007-12-12.pdf, 7
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TransportationCommission | 2007-12-12 | 7 | 7-A. Review of Practices to Evaluate Development Impacts to Bicycles, Pedestrians and Transit. Staff Khan presented the staff report. He described the LOS practices used in Palo Alto, as well as in Florida, for different modes of transportation, and then evaluating them in advance of development that occurs. He noted that they examined the effective green time for a pedestrian to cross an intersection in conjunction with the cycle length of the signalized intersection. He noted that this method was simple to calculate. At unsignalized crossings, the method examines how many gaps were available in the traffic stream. It also examined how much delay a pedestrian would experience. The Highway Capacity Manual also has a method for calculating bicycle impacts, and looked at substantial additional data that would be needed to calculate that information. He noted that Florida Department of Transportation (DOT) recommended avoiding using one LOS method for all modes. The consultant looked at the combination of the Highway Capacity Manual method to calculate the delay to pedestrians, transit and other modes like bicycles. Staff Khan noted that it was important to establish a quantitative method to simplify the calculations, and to provide better information to developers. For the impacts on bicyclists, staff recommended using the method used by the Florida DOT, which used physical parameters in conjunction with the volumes and the speeds on a street. Staff was considering the Highway Capacity method, which gave a delay for each approach at an intersection. On a corridor basis, staff recommended, and AC Transit has supported, using the corridorwide analysis (Arterial Level of Service analysis), which provided the travel time or delays on an arterial or a street. It took several intersections in the analysis into account, and provided the total delay that a line can experience. Chair Knox White noted that Dowling Associates had worked on a similar project for the City of San Francisco, and he was surprised to see very little of their work in this report. Staff Khan replied that he asked the same question, and Dowling stated that they took it into account; they also stated that they were also working for the Federal Highway Administration (FHWA) to develop standards for a highway capacity manual. He understood that knowledge was incorporated in this study. At the request of Chair Knox White, Staff Khan read the letter from Nathan Landau of AC Transit, regarding the report and the recommendation of transit. AC Transit was interested in looking at corridorwide impacts; staff was also interested in using intersections as well. He noted that he had not received specific direction regarding CEQA issues. Chair Knox White noted that as multiple LOS standards are set up for multiple transportation forms, there will be conflicts, especially when possible mitigations impact other modes. He inquired about the process going forward with respect to any tradeoffs and consistency in the process. 7 | TransportationCommission/2007-12-12.pdf |