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What’s New

What’s New. New Peaking Factors from 2001 Travel Survey New Parking Model Transit Vehicles incorporated into Highway Assignment Improved Heavy Duty Truck Model Improved Network Accuracy. The Results. Total VMT: Less than 3% difference from HPMS for both SCAB and the total modeling area.

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What’s New

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  1. What’s New • New Peaking Factors from 2001 Travel Survey • New Parking Model • Transit Vehicles incorporated into Highway Assignment • Improved Heavy Duty Truck Model • Improved Network Accuracy

  2. The Results • Total VMT: Less than 3% difference from HPMS for both SCAB and the total modeling area. • Total Screenline Difference: LM =3.5%, HDT =12.3% • Transit Boarding: MTA within 5%, total region 3%

  3. The Process • SED • Networks • Trip generation / Auto ownership • Trip Distribution • Model choice • Trip Assignment • Emissions Analysis

  4. Modeling Area • 6 Counties • 53 RSAs • 4 Air Basins • 3827 Traffic Analysis Zones (TAZ) and 26 Cordon Stations

  5. Air Basins

  6. Zone Systems

  7. TAZ Statistics Note: Imperial county model has 636 TAZS.

  8. Highway Network • Thomas Brother map-based • Extensive street inventory survey

  9. Highway Network by facility type

  10. Highway Network Detailed view

  11. Highway Network with park & Ride lots

  12. Highway Network detailed view

  13. Transit Network: 5

  14. Transit Network

  15. Transit Networkin downtown

  16. Transit Networknumber of lines at stops

  17. Trip Generation Model • Work trips from workers by income and household size • Non-work trips from households by size and auto ownership • Logit-based auto ownership model • Inputs include population, household, employment by type, and by income group, household income, and transit accessibility • Outputs 13 trip types by peak and off-peak

  18. Trip Distribution Model • Separate peak and off-peak trips • Separate HBW trip distribution for each income group • HBW trip distribution based on Logsums from mode choice • School trip distribution constrained by K factors • Outputs 26 trip tables

  19. AM Auto Travel Time to SCAG

  20. Mode Choice Model • Nested Logit models • Model Peak and off-peak trips • Includes non-motorized trips • Separates models for each of the five trip types. • Subdivides transit trips by service and access mode

  21. Mode Choice Model • Trip tables: HBW by income group, HBO, HBSch, OBO, WBO • Zonal data:population, housing, employment, median household income by income group, auto ownership by income group • Transportation data: time and cost by mode • Output: 72 trip tables, and logsum by income

  22. Figure E-1: HBW Mode Split Nesting Structure

  23. Mode ChoiceAM HOV production/attraction

  24. Mode ChoiceAM Truck production/attraction

  25. Mode Choicedrive alone trip production/attraction

  26. Mode ChoiceAM walk to transit production/attraction

  27. Trip Assignment • 4 time periods • Equilibrium assignments • 3 class light and medium vehicles (SOV, HOV2, HOV3+) • 3 class heavy duty trucks • Simultaneous assignments with Bus and Truck PCE conversion • Transit assignment by access mode

  28. Year 2000 AM Peak Congestion Speed

  29. Year 2000 PM Peak Congestion Speed

  30. Auto Assignment ResultsAM vs.average daily volume

  31. Auto Assignment ResultsAM truck volumes

  32. 2000 AM Peak Volume/Capacity Ratio

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