Travel demand models

Anders KarlströmDept of Transport Science

Division of Transport and Location Analysis (TLA)

Where are we?

Remember, there are four exam categories1. Demand modelling with Logit2. Assignment3. LUTI4. Models and appraisal

Content Demand

1. Demand (contd)Logit model (repetition)Nested logit modelTrip generation, Trip distribution and modal splitLocational choice modelling (Nov 27)(car ownership)

Assignment

2. AssignmentDec 4

Content 3. LUTI

Content Modelling and Appraisal

4. Modelling and AppraisalOther models than Logit

Car ownership modellingScheduling models (Mon Dec 9)

Appraisal: What is it? What is it, really? Critique and defense (more on Dec 16)

On appraisalvW ch 14 (contd)

Consumer surplusValuation of time, what is it? Relation to GDP?Trip purposes, non-linearities?RP vs SP

SCBA vs MCA

Travel demand models

• So-called four step models• Trip generation• Trip distribution• Modal split• Assignment

• Land-use?

Definition and notation

• Trip matrix• Generalized cost of travel• Value of time

Definition and notations

Transit terminology• In-vehicle time• Access and egress time• Waiting time

Singly and doubly constrained models

(OW 5.3-5.4)

Example nested logit

Nested logit, remember theRed bus - Blue bus ?

3 destinations

The nested logit modelKnown as the hierarchical logit (HL) in the book OW

Variables

Standard model

Work tour model

Trip purposes

Non work tours

Extensions