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I. <br /> The cross section of Main Street varies considerably <br /> throughout the study area. North of La Veta, Main Street has four lanes <br /> and a left turn median. Signals exist at two intersections between <br /> Chapman Avenue and La Veta Avenue, but they do not seriously effect <br /> street capacity. The capacity of Main Street is determined at the <br /> intersections with La Veta and Chapman. South of La Veta, Main Street <br />L generally has three lanes northbound and two southbound with median <br /> turning lanes. The curb widths vary, but the five travel lanes exist <br /> between 17th and La Veta. Main Street, in the vicinity of 1-5, has <br />In <br /> experienced severe congestion in years past. Recent improvements by the <br /> *- City of Santa Ana including relocation of the southbound on-ramp, <br />U elimination of parking and left turns at several locations and <br /> restriping have significantly improved the level of service. Left turn <br />U, restrictions associated with the I-S/Main Street Interchange (southbound <br /> off and northbound on) have increased the inconvenience for some freeway <br /> traffic. However, this inconvenience is offset by a significant <br /> improvement in the level of service provided on Main Street. Several <br />K "complaints" were registered by residents during the Phase One TSIP <br /> Study regarding the inconvenience caused by left turn restrictions but <br /> actual measurements show relatively little impact whereas travel time on <br />III Main Street is much improved. <br />r. Traffic Volumes <br />K Peak hour traffic volumes were used for analytical purposes <br /> for both present and future conditions. Peak hour volumes for all <br />IL. signalized intersections in the study area are presented in Appendix <br /> Il-A. The source of data is existing counts from the two cities, both <br /> of whom maintain active annual counts programs, and several additional <br /> counts collected expressly for the Phase Two Transportation System <br /> Improvement Study. The machine counts along with several individual <br /> intersection peak hour turning movement counts were collected by Newport <br /> Traffic Studies (NTS). CalTrans provided information on freeway counts <br /> as well as selected on and off ramp peak hour counts. Travel time and <br /> delay data were collected for all major roadways in the study area and <br /> is presented in Appendix Il-B. <br /> 73