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Appendix E (Initial Study/Part~ ~ Page 12 A study area was selected to measure the impacts of the proposed project when added to the existing and potential project conditions. The specific intersections included in this evaluation are: • Davis Street/East 14th Street • Davis Street/Hays Street • Davis Street/Carpentier Street • Davis Street/San Leandro Boulevard • Davis Street/Alvarado Street • Davis Street/Wayne Avenue/Preda Street • Davis Street/Pierce Avenue/Douglas Drive Traffic conditions on roadways are described in terms of levels of service. These levels illustrate ease of maneuverability and expected traffic delays at each level. Levels of service range from A to F with level of service (LOS) A representing ideal, free-flow conditions and LOS F representing unstable, severely congested conditions. The City of San Leandro has established a minimum of LOS D for San Leandro roadways and intersections. Any projects that would result in a level of service worse than D would require mitigation. The operating conditions at the signalized study intersections were evaluated using the 1994 Highway Capacity Manual (HCM) methodology. The operating conditions at the intersection of Davis Street/Carpentier Street were evaluated using the 1994 HCM methodology for unsignalized intersections. Appendix A of the traffic study contains a detailed description of the methodologies. Turning movement counts for the a.m. and p.m. peak hours for all existing study intersections were conducted by TJKM in October of 1999. Existing + Project Scenario Under this scenario, all study intersections are projected to operate at similar service levels as the existing conditions. The intersection of Davis Street/Carpentier Street is expected to operate at LOS F during the peak hours. With the addition of a westbound Davis Street left-turn lane and an exclusive southbound Carpentier Street right-turn lane, the intersection as a whole is expected to operate at LOS A and B during the a.m. and p.m. peak hours, respectively. However, during the p.m. peak hour, the minor movements would continue to operate at LOS F. The southbound left- turn movement from Carpentier Street would experience the greatest delays during the peak hours. Traffic signals are warranted at Davis Street/Carpentier Street based on the estimated p.m. peak hour volumes. '*_ should be noted, however, that this intersection is approximately 300 feet east of the signalized intersection of Davis Street/San Leandro Boulevard. Therefore, if signalized, it would need to be coordinated with the signal at Davis Street/San Leandro Boulevard. Since Davis Street is a State Route, Caltrans would need to approve the installation of a signal. _.. Cree Plaza - IS/Part 2