By Jennifer Dill, Ph.D.
Professor, Urban Studies & Planning
This week I’m at the International Travel Survey Conference in Australia. The conference happens every three years, attracting over 100 geeky people who spend time thinking about things like stated preference experiments, smartphone data collection, combining sampling frames, and respondent burden. I presented some work from our five city Green Lanes project, comparing our survey data with “objective” measures, such as videos and traffic counts. The focus was on intersections, where the protected lane is no longer separated from motor vehicles. An example of one design used in Portland, OR is shown in the adjacent figure.
Some of the comparisons are included in our report on the project. For example, we found that when asked on our intercept survey of Portland bicyclists where they should ride at the intersection shown above, only about half got the right answer (over the...Read more