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This scope of work describes the process to update the City of Tukwila's concurrency model from a 2008 <br />base year to a 2018 base year. The required tasks include collecting new traffic counts, updating the base <br />year scenario land use and transportation data and developing a 6-year forecast scenario in the City's <br />model, validating the City's traffic model to 2018 conditions, calculating intersection and corridor level of <br />service (LOS), and extracting information from the City's model for the concurrency tracking spreadsheet. <br />Task 0. Project Management <br />This task includes ongoing project management and contract administration costs throughout the <br />duration of the project. <br />Deliverables: Project coordination conference calls with City of Tukwila Planning and Public Works staff as <br />necessary throughout the project. Monthly invoices and progress reports. <br />Task 1. Data Colllection <br />2-hour PM peak period traffic counts will be collected at the same 63 intersections where counts were <br />previously for the concurrency model. The count information will be post -processed for use in the Synchro <br />models as well as for model validation. <br />Deliverables: Raw intersection count data will be transmitted to City electronically. <br />Task 2. 2018 Base Year Model Update and 2024 Future Year Scenario Development <br />The base year scenario of the City's model will be updated from 2008 conditions to 2018 conditions. This <br />includes updating the land use information and incorporating major roadway and transit improvement <br />projects into the model. The City will provide updated land use estimates at the TAZ level within the City. <br />Fehr & Peers will interpolate land use estimates outside the City using the recent data available from <br />PSRC. The City will confirm Fehr & Peers' list of roadway improvement projects that have been <br />constructed since 2008 for inclusion in the model. Regional roadway and transit improvement projects <br />(RapidRide, Link extension, roadway projects in Kent, etc.) will be incorporated consistent with the PSRC <br />regional model. The updated 2018 base year scenario will be validated within the Urban Center using the <br />same 6 screenlines which were used previously. <br />Inputs for the 6-year 2024 future year scenario will be developed using the same methodology as used to <br />develop the inputs for the 2018 base year scenario. The City will provide a land use forecast by TAZ based <br />on pipeline development projects and a list of planned roadway improvements. Fehr & Peers will provide <br />land use and network improvement projects outside the City that are consistent with the regional model. <br />Deliverables: The updated base year and future year model input and output files will be provided to City <br />electronically. <br />Task 3. Intersection and Corridor Level of Service <br />The City's Synchro network will be updated using the 2018 traffic counts. Intersection geometry will be <br />verified using aerial imagery and updated based on information provided by the City. The City will also <br />provide signal timing for all signialized intersections for Fehr & Peers to verify the inputs to the Synchro <br />are consistent with existing operations. The Synchro file was last updated as part of the Southcenter EIS <br />71 <br />