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STATE OF CALIFORNIA--BUSINESS,TRANSPORTATION AND HOUSING AGENCY PETE WILSON, Governor <br /> DEPARTMENT OF TRANSPORTATION <br /> P.O. BOX 2048(1976 E. CHARTER WAY) <br /> STOCKTON,CA 95201 • <br /> (209)948-3803 <br /> May 26, 1993 <br /> 10-SJ-5 47.6 <br /> John McHugh/Barnyard <br /> 1-5/Wainut Grove Road <br /> APNs 001-150-8&29 <br /> SP-93-1 <br /> M r. Richard Larrouy j <br /> Community Development Dept. <br /> 1810 East Hazelton Avenue "' 1993 <br /> Stockton,CA 95205 <br /> PLANNING I;Ivi.gq); k: <br /> Dear Mr. Larrouy: <br /> Caltrans has reviewed the Special Purpose Plan,SP-93-1,for the Old Barnyard project. Our main <br /> concern is the traffic impact this project will have at the 1-5/Walnut Grove interchange. If not already <br /> completed,we recommend that a traffic analysis (study) be done for this location. If a traffic analysis <br /> has been completed,we would like a chance to review an updated version. Without a traffic study, <br /> we have the following recommendations; <br /> We support the County's widening of Walnut Grove Road to a 4-lane facility from west of the <br /> interchange's southbound on-ramp to its intersection with the main Thornton Road. If this is not <br /> done,we recommend adding at least one eastbound lane on the south side. <br /> - A right-turn lane for the last 400 feet on the northbound off-ramp would be necessary. <br /> -- The existing driveway would need to stay in the same location or be relocated further east. The <br /> existing location is approximately 500 feet east of the northbound off-ramp. <br /> If a traffic analysis is done,it should include the following: <br /> -- The analysis needs to use recognized trip generation rates (i.e., ITE Trip Generation Book) and <br /> document any model used. <br /> An analysis is needed of the existing traffic,the existing traffic plus the project related traffic, and <br /> the cumulative traffic, including all known proposals. These analyses should be expressed in terms <br /> of ADT, AM/PM peak hours, and include the turning movements at all major intersections. <br /> - There needs to be an evaluation of this project's impacts on the degradation of level of service <br /> (LOS),operational integrity,and safety on all transportation facilities in the project vicinity. Caltrans <br /> is specifically interested in the impacts to the interchange and 1-5. <br />