Refined Statewide California Transportation Model Progress Report November 2009
Study area - the State of California. Forecast trips made on a typical fall / spring weekday i.e. when schools are in session. 4 time periods represented within day: AM Period (6AM 10AM) Midday Period (10AM 3PM) PM Period (3PM 7PM) Rest of Day (12AM 6AM; 7PM 12AM) Internal Zone System specified 5,131 zone system to ensure reasonable zone sizes, and geography compatible with PECAS, Census, County boundaries External Zone System use existing HSR 48 zone system for highways at boundary, with possible expansion to represent port trucking activity
The model will have 5 separate demand segments, with separate models developed for each segment: Short distance Person (household) trips a brand new disaggregate multimodal tour-based model will be calibrated using available travel survey data; - design done with empirical basis, data prep work underway, initial working core developed Long distance Person (household) trips based on the existing HSR person-based model for inter-regional trips; - awaiting new network Short distance commercial vehicle trip the disaggregate tour-based commercial vehicle models developed for Edmonton and Calgary will be used, modified for California conditions; - design done, getting count data Long distance commercial vehicle trips these will be derived from PECAS model forecast activity / commodity flow movements; External gateway trips a new aggregate external trip model will be developed specifically for these trips. A disaggregate synthetic population of households and persons will be generated for each TAZ, for application with the person trip models. - done
The model will have 5 separate demand segments, with separate models developed for each segment: Short distance Person (household) trips a brand new disaggregate multimodal tour-based model will be calibrated using available travel survey data; - design done with empirical basis, data prep work underway, initial working core developed Long distance Person (household) trips based on the existing HSR person-based model for inter-regional trips; - awaiting new network Short distance commercial vehicle trip the disaggregate tour-based commercial vehicle models developed for Edmonton and Calgary will be used, modified for California conditions; - design done, getting count data Long distance commercial vehicle trips these will be derived from PECAS model forecast activity / commodity flow movements; External gateway trips a new aggregate external trip model will be developed specifically for these trips. A disaggregate synthetic population of households and persons will be generated for each TAZ, for application with the person trip models. - done
The road network will be built off the existing HSR model road network, with necessary adjustments to represent appropriate level of detail. 90% done Freeways, expressways, & major arterials will be explicitly represented, with additional detail as required. Separate networks will be specified for each model time period, to allow for HOV / HOT / reversible lane operation. Inter-regional transit networks for rail, air and bus will be explicitly coded, together with urban rail and BRT systems existing coding for HSR looks adequate Local bus service will be represented by an approximation method based on highway times, and analysis of service provided on existing transit systems based on schedule / journey information available via Google - underway - Connect new TAZ system - Clean-up Messy boundaries between MPO networks - Add appropriate density to certain counties left very sparse
The road network will be built off the existing HSR model road network, with necessary adjustments to represent appropriate level of detail. 90% done Freeways, expressways, & major arterials will be explicitly represented, with additional detail as required. Separate networks will be specified for each model time period, to allow for HOV / HOT / reversible lane operation. Inter-regional transit networks for rail, air and bus will be explicitly coded, together with urban rail and BRT systems existing coding for HSR looks adequate Local bus service will be represented by an approximation method based on highway times, and analysis of service provided on existing transit systems based on schedule / journey information available via Google - underway - Connect new TAZ system - Clean-up Messy boundaries between MPO networks - Add appropriate density to certain counties left very sparse
The road network will be built off the existing HSR model road network, with necessary adjustments to represent appropriate level of detail. 90% done Freeways, expressways, & major arterials will be explicitly represented, with additional detail as required. Separate networks will be specified for each model time period, to allow for HOV / HOT / reversible lane operation. Inter-regional transit networks for rail, air and bus will be explicitly coded, together with urban rail and BRT systems existing coding for HSR looks adequate Local bus service will be represented by an approximation method based on highway times, and analysis of service provided on existing transit systems based on schedule / journey information available via Google - underway
Appropriate traffic assignment equilibrium and model feedback loops will be developed to ensure consistency in model operation (subject to practical limits on length of time on model runs). The model will be implemented using CUBE software as the main platform. The CUBE Cluster application will be used in order to reduce model run times. The model will integrate with the PECAS model. Projected changes in development activity output from PECAS will be used to determine changes in zonal development activity inputs for the travel model.