My understanding is that this is the authoritative textbook for transportation planning, at least the relatively progressive strands of the discipline. Unfortunately, it's very hard to get a hold of... UBC only has the typewritten first edition from 1982, which is very difficult to read, and the University of Toronto only has one copy in its entire library system.
But, I've had a chance to sit in UofT and skim their copy. The book looks excellent; I'll probably buy a copy for my own use. It's very technical, aimed at students studying for professional work in the field, but (as someone interested in that possible future) very useful to those types.
So far, I've basically just copied down the table of contents below, since it's very hard to find information like this without a copy of the book on hand... useful for anyone else out there on the Internet who's thinking of buying the book.
Urban transportation planning is the process of
[pp. 4-5]
Multimodal transportation planning is defined as
The process of defining problems, identifying alternatives, evaluating potential solutions and selecting preferred actions that meet community goals in a manner that includes all feasible transportation modes [1].
[p. 7]
A good overview of the methods and types of data used, typical sample sizes and data collection costs. Also includes discussion of data collection used in various MPOs, including Portland.