Select the correct order of steps in travel demand modelling :
- ATrip Generation – Mode Choice – Trip Distribution – Traffic Assignment
- BTrip Generation – Trip Distribution – Mode Choice – Traffic AssignmentCorrect
- CTraffic Assignment – Trip Generation – Trip Distribution – Mode Choice
- DMode Choice – Trip Generation – Trip Distribution – Traffic Assignment
Solution
Concept
Sequential four-step model
Step-by-step solution
1. Trip generation: how many trips are produced and attracted by each zone. 2. Trip distribution: where the trips go (origin–destination matrix). 3. Mode choice: which mode is used. 4. Traffic assignment: which routes are used.
Explanation
The conventional four-step model follows the logical sequence of travel decisions: whether to travel, where, by what mode and by which route.
Why the other options are wrong
The other orders put mode choice before distribution or assignment before generation, which breaks the sequence.
Shortcut
Generation → Distribution → Mode → Assignment.
Common mistake
Placing mode choice before distribution.
Correct answer: B) Trip Generation – Trip Distribution – Mode Choice – Traffic Assignment