1. Distribute the total (AM plus PM) peak work person trip productions and total (AM plus PM) peak non-work person trip productions to obtain the total (AM plus PM) peak person trip production-attraction interchanges for each of the two purposes for the year 2030. In doing so, assume that the travel times in the existing transportation system (Figure 2) will be maintained in the future (note that the zone-to-zone travel time includes the travel time on the arterial and/or the freeway plus the travel time from the network node to the zone centroid; the intra-zonal travel times may be assumed to be the same as the time from the zone-centroid to the network node).

A production-constrained version of the gravity model has been calibrated using the data collected in 2020. The results of this calibration effort reveal that the following friction factor function ensures that the gravity model fits the observed base year trip "length" frequency distributions reasonably well: f(cij) = cijb where = Cij b b travel time (in minutes), i toj 1.5, for work trips 2.0, for non-work trips = Work trips and non-work trips should be distributed using the following work indices and non-work indices, respectively, as measures of the "attractiveness" of each zone in the year 2030. Zone Number Work Index Non-work Index 1 5.0 2 6.1 1,700 2,000 2,500 14,850 3 2.1 4 2.4 Arterial Legend 2 lanes each direction 30 mph signal progression Zone centroid Intrazonal travel time Dummy Link Arterial Freeway 4 miles 2 @ Freeway 3 B D 2 lanes each direction 60 mph design speed 5 miles 3 miles Fig. 2: The Existing Transportation System A production-constrained version of the gravity model has been calibrated using the data collected in 2020. The results of this calibration effort reveal that the following friction factor function ensures that the gravity model fits the observed base year trip "length" frequency distributions reasonably well: f(cij) = cijb where = Cij b b travel time (in minutes), i toj 1.5, for work trips 2.0, for non-work trips = Work trips and non-work trips should be distributed using the following work indices and non-work indices, respectively, as measures of the "attractiveness" of each zone in the year 2030. Zone Number Work Index Non-work Index 1 5.0 2 6.1 1,700 2,000 2,500 14,850 3 2.1 4 2.4 Arterial Legend 2 lanes each direction 30 mph signal progression Zone centroid Intrazonal travel time Dummy Link Arterial Freeway 4 miles 2 @ Freeway 3 B D 2 lanes each direction 60 mph design speed 5 miles 3 miles Fig. 2: The Existing Transportation System