Traffic Congestion

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.
Wired
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.
City Observatory
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.
City Commentary
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!
Frontier Group
Blog post
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.
Todd Litman
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.
CityLab
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.
CityLab
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.
U.S. Pirg
Blog post
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.
Todd Litman
Blog post
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.
Todd Litman
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.
The Vancouver Sun
Blog post
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.
Todd Litman
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.
Politico
Blog post
May 8, 2014, 5am PDT
The “Status of the Nation’s Highways, Bridges, and Transit: Conditions and Performance, Report To Congress” is intended to provide a comprehensive and objective evaluation of our transportation system. Let’s evaluate this evaluation.
Todd Litman
Blog post
January 3, 2014, 6am PST
A new study claims that public transit does not reduce traffic congestion. It is a good example of how not to evaluate this impact. When measured correctly, high quality transit is found to reduce congestion and increase transport system efficiency.
Todd Litman
Blog post
December 29, 2013, 11pm PST
It is time to find better solutions to congestion problems. This requires more comprehensive evaluation in order to identify win-win solutions: the congestion reduction strategies that help achieve other planning objectives.
Todd Litman
September 23, 2013, 5am PDT
Build more lanes, improve operations, let cars do the driving: Are these the best ways to reduce traffic congestion? Richard Mudge thinks a more effective route may be to offer financial incentives to keep people off the roads.
Eno Brief Newsletter