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scag heavy duty truck model update modeling task force january 24 2007 n.
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SCAG Heavy-Duty Truck Model Update Modeling Task Force January 24, 2007 PowerPoint Presentation
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SCAG Heavy-Duty Truck Model Update Modeling Task Force January 24, 2007

SCAG Heavy-Duty Truck Model Update Modeling Task Force January 24, 2007

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SCAG Heavy-Duty Truck Model Update Modeling Task Force January 24, 2007

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  1. Transportation leadership you can trust. SCAG Heavy-Duty Truck Model UpdateModeling Task ForceJanuary 24, 2007

  2. Status of Tasks • Task 1 – Trip Production Model Update – Done • Task 2 – Review Existing HDT Model – Done • Task 3 – Truck Travel Survey – In Progress • Collected data and developed preliminary trip table for Warehouses/Distribution Center/Terminals • Completed pre-tests of truck trip diaries and made recommendations on improvements to sampling methodology for main surveys • Main surveys are in progress

  3. Status of Tasks • Task 4 – External Trucks, Data – Done • Task 5 – External Truck Model – Done • Task 6 – Trip Generation and Distribution Models – In progress • Developing trip rates and trip length frequency distributions for Warehouses/Distribution Center/Terminals • Developed methodology for trip generation and distribution models • Developing TransCAD scripts for trip generation and distribution models • Task 7 – Port Trip Models – Done

  4. Status of Tasks • Task 8 – Truck Assignment – In Progress • Time of day factors • Update PCEs • Truck speed post processing methodology • Truck prohibitions • TransCad Coding • Task 9 – Model Validation – In Progress • Truck counts started – 2/19/07 • Task 10 – HDT Forecasts – Not started • Task 11 – Recommendations – Not started

  5. Warehouse andDistribution Centers Urban Pickupand Delivery ServiceIndustry Manufacturing,Agriculture, Mining Truck Trip Diaries GPS-Based Surveys Survey Methodology Industry Sectors (Trip Purposes) • Construction • Utility • Public Service • Personal Business • Local, Pickup,and Delivery • Courier • Retail Delivery • TRANSEARCH data • New Interviews • LA MTA TLN surveys • No Surveys planned • Use existing model • Trip rates

  6. Truck Travel Survey • Pre-Test of Truck Survey - Completed • Truck Survey Status: • Survey started Jan 2nd • 1750 Introduction Letters Mailed • 260 companies recruited • Survey materials mailed – survey diaries • Receiving back dairies – response rate ? • Target Number of Truck Surveys • Recruit – 4,000 • Target – 2,000 • Committed Completes – 1,700 • Schedule – Complete Survey late February

  7. Thank you