TRANSCAD教程4：DEMAND FORECASTING: TRIP GENERATION

  --- Tot 15000 6800 8250 5000 2000 1350 3300 6650 13.85 Mean 2500 1130 1375 35600 830 325 225 550 1100 2.31 ----------------------------------------------------------------- Definition of Variables in Table 2 ------------------------------------------------------------------ POP = zone population EIND = industrial employment LABF = labor force (by residence) ERET = retail employment CARS = total cars in zone EOth = other employment HINC = median zone household income ETOT = total zone employment DU = total dwelling units in zone Area = zone area (sq.mi.) [Page]

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3.2 Development of Trip Production and Attraction Models

As part of the development of the Miasma Beach Transportation Model, an extensive home interview survey was completed. Travel diaries were collected for all members of approximately 1000 households in the six internal zones. Furthermore, an extensive Cordon Survey was conducted to develop estimates of traffic entering and exiting the study area at the defined external stations. Preliminary analysis of the travel diaries LED to the estimation of population-level trip productions and attractions for the study area. Total trips were segmented into three conventional categories:

1. HBW -- Home Based Work trips
2. HBO -- Home Based Other trips, and
3. NHB -- Non-Home Based trips

A total of 60,000 daily person trips were generated by Miasma Beach residents in the base year (2004); Table 3 presents base year trip productions and attractions. Overall, these trips were found to be split 20 percent HBW, 50 percent HBO, and 30 percent NHB. It's believed that these trip types are fundamentally different based on s

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