425) 28. A transportation planning model is being used to estimate travel patter

Question

425) 28. A transportation planning model is being used to estimate travel patterns. Using the information -0 * (0.34b ±0.01 . G ) 36025 below, determine the total number of auto trips from TAZ 1 to TAZ 3. -?s Trip Productions 93 +4 x Vehicles+ 0.1 x Households+0.7 x Employment Trip Attractions : 327 + 2.2 × Employment + 1.3 x Households TAZ Population Households Vehicles Employment 1,000 1,500 3 3,000 1,100 900 1,400 1,600 2,000 | | |-. TAZ4-1 Travel Time (min) TAZ 12 TAZ 2 TAZ 3 TAZ4 TAZ 1 TAZ 2 | Assume: (Fij = atijb) with TAZ 3 5 4.5 9.5 vm ao-(0.47"OPCm)-(0.22 *TTTm) where FRESNGSTATE

Explanation / Answer

Trip generation is the first step in the conventional four-step transportation forecasting process (followed by trip distribution, mode choice, and route assignment), widely used for forecasting travel demands. It predicts the number of trips originating in or destined for a particular traffic analysis zone.Guidelines for trip generation analysis?.

At TAZ1, Trip Production = 93+ 4*Vehicles + 0.1*Househols + 0.7*Employment

= 93+ 0 +0 +700 = 793.

At TAZ2, Trip Production = 93+1050 = 1,143

At TAZ3, Trip production = 93 +4*1400 +0.1*1100 + 0 = 93+5600+110 = 5,803

Now at TAZ1-TAZ1 = 793/3 = 266 vehicles.

TZ2-TAZ2 = 1143/2 = 571.5 vehicles.

TAZ3 -TAZ3 = 5803/4 =1250 VEHICLES

Therefore auto trips at TAZ-1 = 793/266 = 3 trips

At TAZ-2 = 1143/571.5 =2 trips

At TAZ 3 = 5803/1250 = 4.6 equals to 5 trips

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