Name the steps in the four step travel demand forecasting process where feedback can occur. Which of these feedback loops directly affects land use? Hint: See Figure 11.7.

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There are three loops where this feedback commonly occurs and three loops
where this feedback may occur:
? Congested highway times from traffic assignment affect the trip distribution
and mode choice steps
? Transit times and costs from traffic assignment affect the mode choice step
? Transit times and costs from traffic assignment affect trip distribution where
transit and travel time form a composite impedance for travel cost
? Highway and transit costs may influence employment and residential
locations (possibly in the form of a land use model)
? Auto occupancy may be a function of the time of day
? Highway and transit times and costs may influence the auto ownership model.
The one feedback loop that directly affects land use is the fourth one named
above: travel costs (whether in the form of monetary costs or travel time) may
ultimately influence employment and residential locations.

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