Peak Travel

An article in Miller-McCune on Peak Travel, following up on a paper by Adam Millard-Ball and Lee Schipper (who has a recent paper on the lack of “Peak Travel” in China in the most recent issue of the Journal of Transport and Land Use . We have discussed this idea before, noting that number of […]

COVID-19, Travel Time Reliability, and the Emergence of a Double-Humped Peak Period

Recently published: Gao, Yang, and David Levinson. 2021. “COVID-19, Travel Time Reliability, and the Emergence of a Double-Humped Peak Period.” Findings, August. [doi]. This paper explores the travel time variance, occupancy heterogeneity level, and average network traffic flow of Minneapolis-St. Paul freeway network and determines the time-lag relationship between travel time variance and the spatio-temporal distribution […]

Does telecommuting alter travel behavior and residential choice?

CTS Catalyst summarizes Jason Cao’s Travel Behavior Over Time study in “Does telecommuting alter travel behavior and residential choice?” The potential of telecommuting to alter travel patterns—and even mitigate congestion during peak hours—has sparked interest among transportation planners. Despite this potential, however, the actual impact of telecommuting on traffic has remained an open question. “In practice, […]

Stochastic Congestion and Pricing Model with Endogenous Departure Time Selection and Heterogeneous Travelers

Recently published: Xin, Wuping and David Levinson (2015) Stochastic Congestion and Pricing Model with Endogenous Departure Time Selection and Heterogeneous Travelers. Mathematical Population Studies. Volume 22, Issue 1, 2015, pages 37- 52 Published online: 11 Feb 2015 [doi] [Paywall, but free copy here] [This is part of a special issue on Risk and Uncertainty in Urban […]

Elements of Access: Constant Travel Time Budgets?

By Kay Axhausen One of the most famous claims made about travel behavior is that the time spent on it is constant over the years (Zahavi, 1974). This a claim made for whole populations not individuals, where personal introspection and observation tells us, that the time spent changes with age, family responsibilities, new workplaces or […]

Travels to California

As a Transportationist, I observe transportation. These are my observations on travel to  last week from Minneapolis to Berkeley (via Metro Transit, Delta, BART). Some things work better than others, some better than I imagine. Some still puzzle me. On this trip, I left Minneapolis, taking Metro Transit #8 bus (I was the only passenger […]