Skip to main content

Unlocking Toronto’s gridlock

A project by University of Toronto professor of civil engineering Professor Baher Abdulhai marries cameras with computers to create traffic lights that can measure vehicle flow, understand what it means, and adapt signal patterns to reduce gridlock. “We want the traffic light to learn from experience,” explained Prof. Abdulhai, who is principal investigator on the University of Toronto project, dubbed Marlin, and an expert in intelligent transportation systems (ITS). “In the Toronto experiment we cut down d
March 26, 2013 Read time: 2 mins
A project by University of Toronto professor of civil engineering Professor Baher Abdulhai marries cameras with computers to create traffic lights that can measure vehicle flow, understand what it means, and adapt signal patterns to reduce gridlock.

“We want the traffic light to learn from experience,” explained Prof. Abdulhai, who is principal investigator on the University of Toronto project, dubbed Marlin, and an expert in intelligent transportation systems (ITS).

“In the Toronto experiment we cut down delays by forty per cent, on average.”

This work is part of a broader recognition that something has to be done about gridlock that threatens to paralyse the city. Congestion causes drivers some of the worst commute times in North America and, according to the Toronto Region Board of Trade estimate, is costing the economy US$5.8 billion annually.

The search for solutions has been part of a series of public discussions by transit organisation 6394 Metrolinx, which is seeking ideas on how to fund the next generation of transit expansion.

“Some congestion is a sign of vibrancy,” says Prof. Abdulhai in the draft of an upcoming report for the Residential and Civil Construction Alliance of Ontario, “but too much congestion has many negative consequences. The good news is that there are plenty of approaches to address congestion, traditional and non-traditional, technical and non-technical.”

Related Content

  • January 20, 2012
    Adaptive control reduces travel time, cuts congestion
    Situated in San Diego County, California, the growing city of San Marcos has seen its population increase by 53.5 per cent since the turn of the century. Although this dramatic population increase has spurred economic growth bringing new business, homes and opportunities to the city, it has also increased traffic congestion along its central corridor, San Marcos Boulevard. This became the most congested arterial in the city, and, by 2006, the second-most travelled corridor in San Diego County.
  • February 2, 2012
    Road user charging – change the name to change public perceptions
    Jack Opiola explores the oft-underestimated effect that a charging scheme's name can have on public acceptability and ultimate success. The Bard of Avon wrote: "What's in a name?" For transport, especially Road User Charging, that is an especially relevant question.
  • January 25, 2012
    US congestion costs continue to rise
    The 2010 Urban Mobility Report, published by the Texas Transportation Institute at Texas A&M University, concludes that after two years of slight declines in overall traffic congestion - attributable to the economic downturn and high fuel prices - leading indicators suggest that as the economy rebounds, traffic problems are doing the same. While 2008 was the best year for commuters in at least a decade, the problem again began to grow in 2009.
  • August 4, 2016
    Canada’s Metrolinx opts for Bombardier rail cars
    Rail technology company Bombardier Transportation is to supply Metrolinx, the Province of Ontario's regional transportation agency for the Greater Toronto and Hamilton Area (GTHA), with an additional 125 next-generation Bombardier BiLevel commuter rail cars for service with GO Transit in Toronto. The order is valued at US$328 million and production is scheduled to start in the second quarter of 2018 with final delivery expected in the first quarter of 2020. The BiLevel coach is a most popular double-deck