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77 TABLE 31 APPLICABILITY OF DIFFERENT ANALYSIS METHODS FOR TRANSIT PREFERENTIAL TREATMENTS Field Analytical Preferential Treatment Survey Model Simulation1 Data Requirements Median X X Transit and general traffic Transitway/Exclusive volumes, transit travel speed Lanes Transit Signal Priority X X X Transit and general traffic volumes, transit delay, signal timing Queue Jumps/Bypass X X X Transit and general traffic Lanes volumes, transit delay, traffic queues, signal timing Curb Extensions X Transit and general traffic volumes, right turn volume, clearance time estimate Stop Consolidation X X Transit travel speed 1 Could include application of regional model to assess traffic diversion impacts to other roadways. final corridor scores and the number of different bus prefer- traffic impact, parking impact, and the time to implement ential treatments warranted in each corridor evaluated. the transit priority treatment. Another procedure to identify the cumulative effects SUMMARY OF TREATMENT ANALYSIS METHODS of corridor transit priority treatments on arterials has been applied in Seattle, involving rankings on a 1 through 5 scale Table 31 presents a summary of the applicability of different based on multiple criteria, as shown in Table 30 (30). In this analysis methods and data requirements associated with differ- case, measures include cost, transit delay savings, general ent transit preferential treatments.