FixedDemand - Bi-County-AlaCC-Activity-Based-Model/client_actc_ccta_model_doc GitHub Wiki
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MTC uses representations of internal/external and air passenger demand that is year-, but not scenario-, specific -- meaning simple sketch methods are used to estimate this demand from past trends. This demand is then fixed for each forecast year and does not respond to changes in land use or the transport network.
Internal/external
So-called internal/external demand is travel that either begins or ends in the nine county Bay Area. This demand is based on Census journey-to-work data and captures all passenger (i.e. non-commercial) vehicle demand. This demand is introduced to the model via a matrix (nonres/Inputs/ixDaily2015.tpp) that contains the following four demand tables in production-attraction format:
- Daily single-occupant vehicle flows;
- Daily two-occupant vehicle flows;
- Daily three-or-more occupant vehicle flows; and,
- Daily vehicle flows, which is the sum of the first three tables and not used by the travel model.
Air Passenger
Model originally developed by George Naylor, VTA to represent San Jose Airport Based on spreadsheet model by Mike Aronson, Dowling used for SJO access and people mover studies 1998-2001. Original coefficients from Greig Harvey. Modifications to represent Oakland Airport and SFO. VTA trip generation rates for SJO were set to generate the correct numbers of SJO air passengers from each county (year 2000). Passenger ratios are derived from the 1995 MTC Air Passenger Survey Average daily passenger trips (arrivals+departures) requiring ground access at SJO: 2000: 29,000 2010: 53,000 Trip generation rates in VTA model scaled to generate 29,000 trips in 2000
Oakland passenger forecasts from 2000 RASP and BART OAC EIS, converted to average daily ground access trips: 1999: 24,600 2005: 35,100 2020: 65,000 The airpax demand is processed in the BCMAirports.job script to produce time -period specific trip tables for:
- Single-occupant vehicles;
- Two-occupant vehicles;
- Three-occupant vehicles;
- Single-occupant vehicles that are willing to pay a high-occupancy toll lane fee;
- Two-occupant vehicles that are willing to pay a high-occupancy toll lane fee; and,
- Three-occupant vehicles that are willing to pay a high-occupancy toll lane fee.