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TABLE 4.3.1 Existing Roadway Segment Characteristics Chrisnlonand Corral Hollow Roads are major County roads that extend primarilynorth-south through the project area Both roads have interchanges at|-580south ofthe project site. MacArthur Drive and Tracy Boulevard are minor north -south roads. The major aau%-mgstroodoinc|udgUnneRoedand11th8treet. which also serves ooBusiness |'2D5. Structural Conditions AoTable 4.3`1 indicates, the existing roadway conditions for pavement range from poor togood. Field investigations revealed the location ofpoor sections aa near intersections with heavy truck traffic or nai|nned track crossings. The heavy volume of five or more ox|ed trucks on these roads contributes to pavement deterioration. According to the peek 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 ofPublic 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 4.3.2displays the morning and evening peak hour turning counts conducted on August 26. 1983. for each study intersection. ,Operating Conditions Operating conditions analysis for the existing intersections utilizes proceduresand methodology from the Highway Cai?acity Manual - Special Report 209 0HC&M. Transportation Research Boand, 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 HCyWuses 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 8 contain the analysis criteria and their corresponding levels of service for two-way stop, multi -way stop and signalized intersections. Figure 4.3.6 displays the level of service analysis results for the five selected intersections under existing conditions. Safety Conditions The NOP response from the Irrigation District identified the intersection of MacArthur Drive and UnnaRoad as an existing safety problem based onthe number offatalities. Table 2summarizes accident data from the last five years at the intersection. ER -93'1 -48- Ill Aneage Condition Chrisman Road Rural Arterial/Expressway 2 Adequate pavement, limited shoulder and faded striping. Tracy Boulevard Minor Arterial 2 Adequate pavement and striping. Corral Hollow Road Rural Arterial/Expressway 2 Good to adequate pavement and striping. 11 th Street Major Arterial 4 Good pavement and striping. Chrisnlonand Corral Hollow Roads are major County roads that extend primarilynorth-south through the project area Both roads have interchanges at|-580south ofthe project site. MacArthur Drive and Tracy Boulevard are minor north -south roads. The major aau%-mgstroodoinc|udgUnneRoedand11th8treet. which also serves ooBusiness |'2D5. Structural Conditions AoTable 4.3`1 indicates, the existing roadway conditions for pavement range from poor togood. Field investigations revealed the location ofpoor sections aa near intersections with heavy truck traffic or nai|nned track crossings. The heavy volume of five or more ox|ed trucks on these roads contributes to pavement deterioration. According to the peek 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 ofPublic 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 4.3.2displays the morning and evening peak hour turning counts conducted on August 26. 1983. for each study intersection. ,Operating Conditions Operating conditions analysis for the existing intersections utilizes proceduresand methodology from the Highway Cai?acity Manual - Special Report 209 0HC&M. Transportation Research Boand, 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 HCyWuses 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 8 contain the analysis criteria and their corresponding levels of service for two-way stop, multi -way stop and signalized intersections. Figure 4.3.6 displays the level of service analysis results for the five selected intersections under existing conditions. Safety Conditions The NOP response from the Irrigation District identified the intersection of MacArthur Drive and UnnaRoad as an existing safety problem based onthe number offatalities. Table 2summarizes accident data from the last five years at the intersection. ER -93'1 -48- Ill