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<br />Albert Grover & Associates <br /> <br />Project Approach <br /> <br />AGA will also coordinate with adjacent jurisdictions (e.g., the Cities of Costa Mesa, <br />Irvine, Tustin, Orange, Garden Grove, and Fountain Valley) regarding speed limits <br />for highway segments abutting or under joint control with the City of Santa Ana. <br /> <br />Task 3 - Roadway Segment Characteristics and Speed Limit Sign Locations Review <br /> <br />This task will be performed by Mr. Mark Miller, P.E., a registered Civil Engineer and <br />Traffic Engineer in California. Mr. Miller will drive all of the street segments to <br />determine, on the basis of experienced traffic engineering judgment, whether or not <br />there are any roadway characteristics not readily apparent to the motorist which would <br />justify the lowering of the proposed speed limit to the maximum reduction permitted <br />under the State established guidelines. Factors considered will include street width <br />and alignment, traffic flow characteristics, number of lanes and other channelization <br />and striping patterns, frequency of driveways and intersections, reversed super <br />elevations, visibility obstructions caused by vertical or horizontal curves, roadside <br />land use, grade, heavy pedestrian or truck traffic, heavy on-street parking maneuvers, <br />and any other roadside conditions that are not apparent to the motorist. The field <br />reviews for traffic factors will be conducted while school is in session. <br /> <br />As part of this work, locations of all speed limit signs will be reviewed in the field to <br />ensure that the speed limit signing is in accordance with the adopted speed limits per <br />the previous speed survey report. Any speed limit sign location modifications <br />recommended will be noted. The field survey will be documented for analysis <br />purposes. <br /> <br />The product of this review will be a summary of each of the study segments and <br />identification of the study segments which justify consideration for maximum <br />increase/decrease in the recommended speed limits. <br /> <br />Task 4 - Accident History Review and Accident Rate Calculations <br /> <br />Under this task, Mr. John Taylor of AGA will review the mid-block accident history <br />of each of the street segments to be included in the survey. For this purpose, the <br />SWITRS, or City maintained accident report data, will be used in conjunction with <br />the City's Crossroads Accident Database Program, and the appropriate accident rate <br />for each study link will be calculated. If recent ADT counts are not available from the <br />City, existing counts will be multiplied by an appropriate growth factor (supplied by <br />the City) to estimate current traffic volumes. The calculated accident rate will be <br />compared with the expected accident rate for various types of roadways. <br /> <br />As we did on our previous Santa Ana Speed Survey Project, AGA will enter all data <br />directly into the City's Crossroads software on the City's computer system and utilize <br />available collision and traffic data through the same system and/or hard copy <br />information available at the City. <br /> <br />6 <br />