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STATE OF CALIFORNIA--BUSINESS TRANSPr"'T -ON AND HOUSING AGENCY GRAY D ALIS Gnverr'or DEPARTMENT OF TRANS RTATION P.O.BOX 2048(1976 E.CHARTER WAY) STOCKTON,CA 95201 a TDD 209 948-7981 PHONE (209)941-1921 FAX (209)948-7194 JAN 14 2002 Fler lour power! Beenergye icient! January 10, 2002 10-SJ-12188-12.84 VTM#SU-00-1 Lockefo rd Oaks Subdivision Ms. Jennifer Jolley Community Development Department San Joaquin County 1810 E. Hazelton Avenue Stockton, CA 95205 Dear Ms. Jolley: Caltrans Transportation Planning has reviewed the Major Subdivision application to create 306 residential lot subdivision (Lockeford Oaks). This project is located on the northeast corner of Brandt Road and Jack Tone Road in Lockeford. Caltrans has the following comments: I. Caltrans Traffic Operations reviewed the Final Traffic Impact Study, dated October 2001 that was prepared for this project. Page 8 stated that the SR12/88/Jack Tone Rd intersection currently meets Caltrans peak-hour Warrant-11, and hence, a traffic signal is recommended to be installed at this intersection as a mitigation measure for the existing condition (page 26). Caltrans would like to state clearly that meeting one or more signal warrants is not necessarily sufficient justification for the installation of a traffic signal since the factors to be considered in placing a signal should include delay, congestion, approach conditions, etc. Caltrans will need to verify this signal warrant claim, and may need to conduct a full signal- warrant study at this intersection to assess any necessary operational mitigation for this intersection. 2. Caltrans has determined that this project needs to contribute its fair share to the signalization k of the SR 12/88/Jack Tone Rd as a mitigation measure. This is due to the fact that without this project, this intersection would not warrant an immediate mitigation. Using Caltrans methodology for calculating equitable mitigation measures, this project's fair share contribution is 9.1% of the total cost that will be needed to install_ a signal at this intersection. 3. Analyzing the volumes of the "Existing Plus Approved Projects (EPAP) condition" and the "EPAP plus project condition", it clearly indicates that the traffic generated by the proposed subdivision is solely responsible for making the SR 12/88/Brandt Road intersection meet warrant 11. Therefore, the proposed project will be required to contribute its "fair share" towards the cost of signal installation, as well as impact fees towards any additional improvements required by cumulative impacts at this intersection. 4. The recommended lane geometries for cumulative conditions are not sufficient to accommodate the additional traffic at the intersections of Jack Tone Road, Brandt Road, and SR 12 with SR 88: eastbound SR 12 left-turn peak volumes to northbound (NB) SR 88 are greater than 300, which requires dual left turn lanes (again, please be consistent with proposed geometries at this intersection in project EA 2A9100. As previously mentioned on ; letter dated June 6, 2001, a separate NB right turn lane at the SR 12188/Jacktone Road and SR 12/88/Brandt Road intersections are also required as part of the project's mitigation. 'Caltrans improves mobility across California" 606700.S1.]0LLEY.LOCKEFORD OAKS SUBDIVISION OKEREKE.mm