February 28, 2017, 5am PST
The new INRIX Traffic Scorecard uses "big" data to calculate congestion costs. Like previous studies, it exaggerates traffic congestion costs and roadway expansion benefits.
January 27, 2017, 12pm PST
The annual Urban Mobility Report (UMR), published by Texas Transportation Institute (TTI), should come with a warning label.
December 6, 2016, 8am PST
Bikeshare programs were first introduced in the U.S. seven years ago. Outside Magazine investigates whether they "are actually benefiting cities and their residents."
December 5, 2016, 2pm PST
Technology startup Parkifi seeks to use the Internet of Things to address the long-lamented problem of congestion created by drivers seeking parking.
May 23, 2016, 10am PDT
The $1.5 billion, 6.6-mile light rail extension from Culver City to Santa Monica is projected to double trips on the line by 2030, giving commuters a viable alternative to driving. Just the same, don't expect the extension to reduce congestion.
March 25, 2016, 8am PDT
TomTom's annual traffic congestion rankings predictably generated horrified, self-pitying headlines about awful congestion in top-ranked cities. But there are big problems with their methodology.
September 3, 2015, 8am PDT
A curious discrepancy between two major congestion reports using the same data: There is a profound and unexplained discrepancy between the travel trends in the latest Urban Mobility Scorecard report and the data provided by Inrix.
September 2, 2015, 11am PDT
The University of Michigan Transportation Research Institute released its eighth report on peak motorization in the U.S., an evaluation of time spent traveling for a broad category of purposes, not just work. From 2004 to 2014, total time decreased.
The University of Michigan Transportation Research Institute
August 27, 2015, 8am PDT
The Texas Transportation Institute's latest Urban Mobility Scorecard claims, that "TRAFFIC GRIDLOCK SETS NEW RECORDS FOR TRAVELER MISERY." This critique by the Frontier Group puts their hyperbole into perspective. No need to panic!
August 26, 2015, 1pm PDT
The new Urban Mobility Scorecard measures traffic congestion with greater precision, but incorrectly. As with previous editions, it exaggerates congestion costs and undervalues the congestion reduction benefits of alternative modes and Smart Growth.
August 9, 2015, 7am PDT
Facing record-level population growth and a booming job market, the city of San Francisco wants luxury developers to pay into the public transit system.
May 7, 2015, 1pm PDT
Certain intersections stand to gain from losing their traffic lights. According to this study, cities can save money and improve safety by uninstalling signals in low-traffic zones.
January 8, 2015, 7am PST
The Federal Highway Administration has quietly acknowledged the end of the Driving Boom, cutting its VMT forecast by 24-44 percent. This represents a major change in travel forecasting and planning.
October 14, 2014, 12pm PDT
The new INRIX congestion costing report is another good example of bad analysis. We just want accurate information; hold the hyperbole, please.
September 29, 2014, 6am PDT
Transportation engineers currently evaluate urban transport system performance using roadway level of service (LOS) ratings. Here are six good reasons to change.
August 10, 2014, 11am PDT
California planning expert Bill Fulton discusses a long-awaited proposal from the Governor's Office of Planning and Research that would shift the state's traffic impact assessments away from their current focus on traffic congestion.
California Planning and Development Report
June 26, 2014, 9am PDT
A new study finds that Salt Lake City's TRAX light-rail system significantly reduces traffic on parallel roadways. It estimates that a LRT line reduces daily from 44,000 (if it did not exist) to 22,300 (what actually occurs) on one arterial.
Effect of Light-Rail Transit on Traffic in a Travel Corridor
June 24, 2014, 5am PDT
Although transport planners consider traffic congestion economically harmful, economic productivity tends to increase with congestion and decline with increased road supply. This paradox can be explained by more nuanced analysis of accessibility.
June 11, 2014, 3pm PDT
Conventional evaluation often exaggerates congestion costs by using baseline travel speeds which exceed speed limits. This assumes that traffic speed compliance is a congestion cost that justifies major infrastructure investments to alleviate.
May 17, 2014, 9am PDT
Robert Bruegmann, professor emeritus of art history, architecture, and urban planning at the University of Illinois at Chicago, defends the recent attacks against Atlanta, especially regarding its sprawling footprint.