2G. Traffic forecasts and monitoring Flashcards

1
Q

Where can the traffic forecast be found?

A

P.E. Handbook 5.1.5 - gravity model

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2
Q

What does TAZ stand for in the gravity model?

A

TAZ stands for Traffic Analysis Zone.
A Traffic Analysis Zone (TAZ) is a geographical area used in transportation planning and traffic modeling. These zones are used to segment a region into manageable units for traffic analysis, and the goal is to estimate traffic volumes, patterns, and movements between zones.

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3
Q

What is the gravity model formula?

A

T’ab=(T’a) (Ab * fab * Kab) / (SUM(Ab * fab * Kab)

T’ab=totalnumberoftripsfromtrafficanalysiszone(TAZ)atoTAZb
T’a =totalnumberoftripsfromTAZa
Ab =totalnumberoftripsattractedfromTAZb
fab =distance/travelcost”frictionfactor”
Kab=estimatedparametertoensureresultsbalance

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