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144 A P P E N D I X E Trip Generation Attractions and Productions for HB Walk Trips HB Walk (Walk trips/PAZ) = [exp (-1.034232 - 0.9455401 * vehicle ownership + 2.371351 * street connectivity + 0.0070639 * percent commercial + 0.0001527 * residential dwelling units)] * total dwelling units in PAZ Attractions and Productions for Non-HB Walk Trips Total NHB Productions (Total trips/PAZ) = 0.798 * Other Employment + 2.984 * Retail Employment + 0.916 * Service Employment + 0.707 * Total Households Note: all variables are calculated at the PAZ level Convert All Trip productions to Walk Trip productions Prob (Walk trip) = exp (UWalk)/(1+ exp(UWalk)) Where, UWalk = -4.286918 + 3.041807 * Connectivity + 0.0051575 * percent commercial Note: variables in this model are calculated at the ¼ mile buffer of the trip end. Total NHB Attractions (Total trips/PAZ) = 0.636 * Other Employment + 3.194 * Retail Employment + 0.730 * Service Employment + 0.803 * Total Households Note: all of the variables are calculated at the PAZ level Convert All Trip attractions to Walk Trip attractions Prob (Walk trip) = exp (UWalk)/(1+ exp(UWalk)) Where, UWalk = -4.286918 + 3.041807 * Connectivity + 0.0051575 * percent commercial Note: variables in this model are calculated at the ¼ mile buffer of the trip end. Trip Distribution T P A F K A F K ij i j ij ij j ij ij j â=       Baltimore MoPeD Model11 11 Clifton, K. J., et al. Pedestrian Demand Model & Crash Protocol. Maryland Department of Transportation, State Highway Administration (June, 2008)
145 Trip DistributionâHome-Based Walk Trips Trip DistributionâNon-Home-Based Walk Trips
146 Variables Used in Model Estimation