17 - Chapter8-Travel Forecasting

# 17 - Chapter8-Travel Forecasting - Destination Mode and...

This preview shows pages 1–6. Sign up to view the full content.

Destination, Mode, and Route Choice TTE 4004 11/14/11

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Recap – 4 Step Travel Forecasting 1. Trip Generation How many trips? 2. Trip Distribution Where are trips going to/from? 3. Mode Split Which mode for these trips? 4. Network Assignment Which route will the traveler choose?
Recap – Trip Generation Purpose: To develop an expression that predicts exactly when a trip is to be made Grouped by: Household – trips per household Type – work, shopping, social Time – only concerned with peak hour New Purpose: To develop and expression to predict how many trips of a certain type will be made during the peak hour by a given household

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Recap – Trip Generation Poisson regression trip generation models ( 29 ! i i T i i i e P T T λ - = (Eq. 8.2) T i  = number of vehicle-based trips of a given type (shopping or social/ recreational)  made in some specified time period by household  i , P ( T i ) = probability of household  i  making exactly  T i  trips  λ i  = Poisson parameter for household  i , which is equal to household  ’s expected  number of vehicle-based trips in some specified time period,  E [ T i ]. i i e λ= BZ (Eq. 8.3) B  = vector of estimable coefficients, Z i  = vector of household characteristics determining trip generation
Destination / Mode Choice After the number of trips generated is

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/07/2011 for the course TTE 4004 taught by Professor Staff during the Fall '08 term at University of Florida.

### Page1 / 21

17 - Chapter8-Travel Forecasting - Destination Mode and...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online