SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

5.12 TRAFFIC AND TRANSPORTATION construction staff needed is 305 workers. The first shift would start at 6:00 AM and end at 2:30 PM,while the second shift would start at 2:30 PM and end at 11:00 PM.The greatest number of truck trips expected during construction of the project in the peak construction month is approximately 20 daily one-way truck trips; it was assumed that only one eighth of the deliveries would be made each hour. Peak construction traffic during the peak month (Month 16) was used for level of service analysis,to analyze worst-case scenario. Because the end of the first shift would coincide with the beginning of the second shift, the worst case scenario would occur between 2:00 PM and 3:00 PM,which will be designated as the peak hour from this point forward. For purposes of this analysis, the truck trips were converted to passenger car equivalent units (PCEs) at a ratio of 1.5 passenger cars for each truck,consistent with the HCM 2000 guidelines. No traffic will be generated between the construction laydown area and the project site because the construction laydown area and the parking area will be located on adjacent property. The construction trip estimates are presented in Table 5.12-5. TABLE 5.12-5 Construction Trip Generation Estimate Number During Peak Hour of Trip Type ADT" Workers In Out Total Delivery/Haul Trucks 20 x 2 0 3 3 6 PCE (1.5) 60 - 4 4 8 Workers Carpooling 61 61 16 16 32 Not Carpooling 488 244 122 122 244 Total Construction Traffic 609 305 142 142 284 *Average Daily Traffic(vehicles/day) 5.12.2.2.2 Construction Traffic Distribution The following assumptions were used to distribute construction traffic over the study area network: 40 percent of trips will originate from Sacramento,using I-5 South • 30 percent would come from Stockton and points south,using I-5 North 20 percent would come from the Bay Area,using SR 4 East,then SR 160 East and SR 12 East 10 percent would come from Lodi and the foothills,using SR 12 West 5.12.2.2.3 Roadway LOS with Construction Traffic Average peak hour traffic generated during the construction period was added to the existing traffic volumes on each roadway segment. The peak hour traffic volumes for the study area roadway segments in the existing condition and with the addition of construction traffic are summarized in Table 5.12-6. Based on the analysis, the roadway segments are forecasted to operate at an acceptable LOS with the exception of North Thornton Road,between West Eight Mile Road and North Devries Road,which degrades from LOS E to LOS F. North Thornton Road between North Devries Road and Frontage Road still operates at LOS D. North Thornton Road between De Broggi Road and SR 12 still operates at LOS F. 5.12-16 SAC/371322/082380003(LEC_5.12_TRAFFIC_AND_TRANSPORTATION.DOC)