ARCHIVED REPORTS_1993 - Laserfiche WebLink

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r ; TABLE 4.3.1 Existing Roadway Segment Characteristics Segment Cla ification Laneage Condition Chrisman Road Rural 2 Adequate pavement, limited shoulder Arterial/Expressway and faded striping. Tracy Boulevard Minor Arterial 2 Adequate pavement and striping. Corral Hollow Rural 2 Good to adequate pavement and ` Road Arterial/Expressway striping. 1 11 th Street Major Arterial 4 Good pavement and striping. Source:.:San Joaquin County Department of Public Works. Facsimile. August 18, 1993. Chrisman and Corral Hollow Roads are major County roads that extend primarily north-south through the project area Both roads have interchanges at 1-580 south of the project site. MacArthur Drive and Tracy Boulevard are minor north-south roads. The major east-west roads include Unne Road and 11th Street, which also serves as Business 1-205. Structural Conditions As Table 4.3.1 indicates, the existing roadway conditions for pavement range from poor to good. Field investigations revealed the location of poor sections as near intersections with heavy truck traffic or railroad track crossings. The heavy volume of five or more axled trucks on these roads contributes to pavement deterioration. According to the peak hour truck classification counts conducted for this analysis, approximately 70-90 percent of peak hour traffic consists of trucks with five or more axles. Field observations during other periods of the days support the conclusion that this percentage is probably maintained throughout the day. Intersections For the purposes of this study, San Joaquin County Department of Public Works officials selected five intersections for analysis. Study intersection selection is done on the basis of their proximity to the project site and probability that project traffic would utilize the intersection. Figure 4.3.2 displays the morning and evening peak hour turning counts conducted on August 25, 1993, for each study intersection. Operating Conditions Operating conditions analysis for the existing intersections utilizes procedures and methodology from the HigLmM Capacity Manual • Special Report 209 (HCM), Transportation Research Board, 1985. The intersection analysis involves two types of controls,traffic signals and stop signs. The intersection control type and its use determines the specific procedure for determining intersection operating conditions. The HCM uses specific analysis criteria that corresponds to levels of service, which vary from A (the best) to F (the worst). The levels of service describe the intersection operating conditions in general terms. ' Tables A-2, A-3, and A-4 in Appendix B contain the analysis criteria and their corresponding levels of service for two-way stop, muni-way stop and signalized intersections. Figure 4.3.6 displays the level of service analysis results for the five selected intersections under existing conditions. Safetn Conditions The NOP response from the Banta-Carbon Irrigation District identified the intersection of MacArthur Drive and Linne Road as an existing safety problem based on the number of fatalities. Table 2 summarizes accident data from the last five years at the intersection. ER-93-1 • 48 • (9-27.93)