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Page 12 <br />Complete Streets Evaluation – Hesperian Blvd November 9, 2018 <br />CONCLUSIONS AND RECOMMENDATIONS <br />Conclusions <br />Overall, the proposed road diet on Hesperian Boulevard from Springlake Drive to Fairmont Drive <br />is expected to have some impact on the roadway operations. With the current signal timings, all <br />study intersections operate at acceptable LOS, except for the Hesperian Boulevard/Thornally <br />Drive intersection. The arterial operates at acceptable LOS during both AM and PM peak period <br />in both directions. <br />With optimized signal timings, all the study intersections are expected to operate at acceptable <br />LOS with lower delays than existing signal timings. The study arterial is expected to operate at <br />acceptable LOS. <br />For the existing year with the project implemented, all the study intersections are expected to <br />operate at acceptable LOS with higher delays than existing (optimized) signal timings. The study <br />arterial is expected to operate at acceptable LOS. However, the project is expected to cause <br />some increase in queuing on the corridor. <br />Under the Cumulative Conditions, the intersections are expected to operate at LOS E or better. <br />Arterial LOS under the cumulative year with no project is expected to be acceptable. <br />Under the Cumulative Plus Project conditions, intersection LOS is expected to deteriorate to <br />LOS F at the Hesperian Boulevard/Fairmont Drive and Hesperian Boulevard/Bayfair Drive <br />intersections during the PM peak period. With the project, arterial LOS is expected to deteriorate <br />to LOS F in both northbound and southbound directions during the PM peak period. <br />For the cumulative year, the project is expected to cause a significant increase in queuing, <br />resulting in a queue spill back from the Fairmont Drive intersection past the Drew Street <br />intersection in the northbound direction during the PM peak period. <br />In summary, the road diet is not expected to have a significant impact on the study area for the <br />existing year, although queues are expected to increase. However, for the cumulative year the <br />project is expected to impact intersection operations and arterial operations, and to result in <br />significant queuing. <br />Recommendations <br />As the analysis shows that removing a vehicle travel lane for this project would likely result in a <br />significant deterioration in operations in the future, DKS developed a few potential mitigations. <br />First, there are some signal modifications which could help with individual intersection <br />operations. Second, there are bikeway options that could constitute a more temporary solution <br />for bicycles and could be reversed if severe traffic develops in the future. Finally, there are more <br />permanent lane management and geometric modifications that would reduce the project impact. <br />Signal Operations <br />During the course of the analysis, DKS noticed that the Hesperian Boulevard/Thornally Drive <br />intersection could operate more efficiently using protected-permissive mode on the westbound <br />approach, due to high westbound left turn volumes. Changing from permissive operations to <br />protected-permissive operations could improve the operation of the intersection and the <br />485