2017-046 - Approving Addendum Nos. 1 and 2

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Santa Ana — Garden Grove Streetcar Project Traffic Study Addendum 2.1.2 Traffic Volumes and Geometric Configuration AM and PM peak hour intersection traffic volumes and roadway average daily traffic (ADT) were referenced from the Year 2035 Streetcar Alternative 1 volumes contained in the Traffic Impact Assessment. Baseline intersection and roadway configurations were based on the geometrics assumed as part of the 2035 Streetcar Alternative 1. The reclassification of Santa Ana Boulevard would reduce the roadway from four lanes to two lanes. 2.1.3 Methodology and Significance Criteria The intersection level of service (LOS) utilizes the Intersection Capacity Utilization (ICU) method as described in Chapter 2.1 of the Traffic Impact Assessment, consistent with City of Santa Ana directives for the preparation of traffic impact studies. An impact would occur when the reclassification of Santa Ana Boulevard would cause any of the affected intersections to deteriorate from acceptable LOS D or better to unacceptable LOS E or F. Furthermore, for intersections already operating at unacceptable E or F, should the reclassification cause the ICU value to increase by 0.01 or more, the location would be considered impacted. Roadway segment LOS is determined based on the methodology presented in the Orange County Master Plan of Arterial Highways (MPAH) and the City of Santa Ana Circulation Element, as referenced in Chapter 2.2 of the Traffic Impact Assessment. The City of Santa Ana Circulation Element defines maximum roadway capacities and corresponding LOS by roadway classification. Level of service of the affected roadway segments will be based on reducing the capacity of the roadway from a four lane facility to a two lane facility. 2.2 Santa Ana Boulevard Station Relocation Analysis 2.2.1 Study Area The relocation of stations along Santa Ana Boulevard between Ross Street and Main Street would only affect the intersection of Santa Ana Boulevard/Ross Street. All other intersections and roadway segments along Santa Ana Boulevard and 4th Street in the vicinity of Broadway and Main Street are not anticipated to be affected by the proposed station location changes. 2.2.2 Traffic Volumes and Geometric Configuration AM and PM peak hour intersection traffic volumes at Santa Ana Boulevard/Ross Street were referenced from Year 2035 Streetcar Alternative 1 volumes contained in the Traffic Impact Assessment. The proposed station relocation at Santa Ana Boulevard/Ross Street would result in closure of the existing westbound free right turn from Santa Ana Boulevard to northbound Ross Street. ® 4 f��