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<br />Albert Grover & Associates <br /> <br />Project Approach <br /> <br />throughout the City of Santa Ana, given their annual contract to collect traffic <br />data at various locations Citywide. <br /> <br />. Evaluate speed limits by reviewing the traffic count data and at least 2 years of <br />accident history at mid-block locations and intersections in conjunction with <br />the speed survey data. <br /> <br />. Prepare the recommendations to maintain/increase/decrease the speed limits in <br />the City. <br /> <br />The following eight tasks have been designed to provide an orderly and efficient <br />completion of the work needed to conduct the speed zone study and the other tasks <br />described in the RFP. <br /> <br />Task 1 - Radar Field Data Collection <br /> <br />After discussing the schedule for conducting the surveys and staff concerns at the <br />initial meeting with City engineering staff, the first task will be to conduct the field <br />radar speed surveys at the 200 recommended road segments. These radar surveys will <br />be conducted by the project subconsultant, Transportation Studies, Inc., of Santa Ana. <br />Certifications of both the equipment to be used by TSI and the personnel who will be <br />gathering the data for TSI are included in Appendix C. <br /> <br />A minimum of 100 bidirectional speed observations, with a mIDlmum of 50 <br />observations for each direction of travel, will be obtained for all of the designated <br />street segments, a list of which will be finalized during the initial meeting with the <br />City staff. For street segments containing a raised median, the survey will include a <br />minimum of 100 vehicles in each direction of traveL The studies will be conducted <br />during "good weather" conditions and only on Tuesdays, Wednesdays and Thursdays <br />during the off-peak hours of 9:00 a.m. to 11 :30 a.m. and I :30 p.m. to 4:00 p.m., <br />unless other specific time limits are required by the City staff. <br /> <br />Each speed zone will be checked for representative free flow speeds, that is, speeds <br />not influenced by temporary conditions or construction work. The radar gun will be <br />calibrated periodically to achieve and maintain accuracy. <br /> <br />The obtaining of a minimum 100 speed samples for each street segment will ensure <br />that there will be a 95% probability that the sample data represents the population <br />data for this type of study. <br /> <br />Task 2 - Speed Data Analysis <br /> <br />Transportation Studies, Inc. will provide AGA with radar speed survey data for the <br />200 roadway segments. AGA will summarize the field data and provide speed survey <br />data sheets (including cumulative speed curves), as contained in our Sample <br />Engineering and Traffic Survey Summary Tables presented in Appendix D. <br /> <br />5 <br />