tte4004%20Chapter%203%2C122

# tte4004%20Chapter%203%2C122 - 2. Trip Distribution 2. The...

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2. Trip Distribution 2. Trip Distribution The objective of trip distribution is to estimate the target-year trip volumes Q IJ that interchange between all pairs of zones I and J , where I is the trip-production zone and J is the trip attraction-zone of the pair. Example I J1 J 2 J 1 & J 2 are competing to attract trips produced by I

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2. Trip Distribution 2. Trip Distribution Assume for Example that J 1 & J 2 are two identical shopping centers (equal attractiveness), competing for the shopping trips produced by I , The distance between I and J 1 and J 2 are different. Therefore, shoppers residing in I will prefer the closer of the two identical centers.
2. Trip Distribution 2. Trip Distribution So distance is used in this example as a measure of difficulty. But other measures could be used, such as travel time, or some generalized cost that includes travel time, out-of-pocket cost, etc. the notation W IJ is used for this generalized cost, known also as (travel impedance) or (disutility).

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Trip-end estimates from trip generation Q I or (P I , A J ) Calibrated trip- distribution model Estimated target year Q IJ Target-year estimates of interzonal impedances W IJ Trip distribution inputs and outputs
The Gravity Model The Gravity Model Based on Newton’s law of gravitation, the force of attraction between two bodies is

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## This note was uploaded on 01/13/2011 for the course CECS Transporta taught by Professor Essamradwan during the Spring '10 term at University of Central Florida.

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tte4004%20Chapter%203%2C122 - 2. Trip Distribution 2. The...

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