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EXHIBIT A SCOPE OF WORK FOR I- 580 /FALLON ROAD INTERCHANGE MODIFICATION PROJECT City of Dublin TRAFFIC FORECAST UPDATE This is the scope of work of CCS Planning and Engineering, Inc. to provide traffic engineering services related to the updating of the traffic portion of the Project Study Report Project Report for the I -580 Fallon Road Interchange, and to redefine the interchange conceptual geometrics based on the Year 2015 traffic forecast for the Phase I, initial project. CCS Planning and Engineering, Inc., in conjunction with TJKM, Dowling Associates, Inc. (Dowling), and David J. Powers and Associates (Powers) will perform the following items of work: PSR TRAFFIC ANALYSIS UPDATE Task 1. Coordination meetings (CCS, TJKM) Attend coordination meetings with City of Dublin, City of Pleasanton, Alameda County, and Caltrans. Task 2. Review Traffic Forecasts and Previous Traffic Analysis Task 2a Compile and review data from previous traffic analysis (TJKM) Task 2b Prepare updated traffic forecasts (Dowling) Produce AM and PM peak hour turning movement forecasts for two intersections: I -580 westbound off ramp and Fallon, and I -580 eastbound off -ramp and Fallon. Plots of AM and PM peak hour link flows will be provided for the freeway and surface street approaches to the interchange and for the interchange itself. This data will be delivered to TJKM Associates for their operations analysis. Task 2c Prepare updated traffic forecasts with Jack London Extension (Dowling) A second set of model runs will be prepared to include the West Jack London Extension to El Charro Road. The same AM and PM peak hour plots and turning movement outputs will be produced and delivered to TJKM Associates. Task 3. Review and update assumptions (TJKM) Prepare year 2015 traffic forecasts based on Dowling Associates' year 2000 validation runs, existing counts, and City's traffic growth patterns. Update assumptions based on the latest available counts (no new counts will be conducted), land -use information, street network, and other issues such as cut through traffic. Task 4. Perform and Update Operation Analyses for Years 2015 and 2025 Scenarios (TJKM) Update the Traffic Operations Analysis for the Fallon Road/I -580 Interchange prepared by TJKM in 1999. Use the 2000 Highway Capacity Manual or 2001 CORSIM to perform the freeway and ramp junctions traffic operations; modified Circular 212 method as adopted by Contra Costa Transportation Authority (CCTA) or method normally used in each City for intersection level of service analysis; Poisson Ratio method (Caltrans approved) to estimate the queue length for the turning lanes at ramp -end intersections; and SYNCHRO to evaluate the queue length and levels 1 11/27/01