Trinity Parkway Would Raise Dallas-Area VMT by One Million Miles a Day

Pitched as a necessary addition to reduce congestion on interstates 30 and 35E as they pass Downtown Dallas, the Trinity Parkway is likely to induce one million additional vehicle miles traveled a day.

1 minute read

January 25, 2016, 6:00 AM PST

By James Brasuell @CasualBrasuell


Brandon Formby reports on effects of the controversial proposed Trinity Parkway project in Dallas: "According to North Texas traffic projections for 2035, drivers who pass through a 34.3-mile area around the road will collectively drive 8 million miles a day if Trinity Parkway is built. But they’ll only drive 7 million miles a day that same year if it isn’t."

Moreover, "while the toll road’s existence is expected to help drivers around the urban core spend 4,817 fewer hours sitting in traffic jams each day, the time they’ll spend driving overall will jump about 11,677 hours a day."

Formby also devotes a lot of time in the article to provide the political context for the debate, as well as the planning perspective on the consequences of the Trinity parkway proposal. As for the current status of the project, Formby provides the following:

Its traffic impacts for 2035 are based off a large-scale version of the road that federal highway authorities say they expect to eventually be built. The Dallas City Council, meanwhile, has commissioned a team of experts and government employees to design a first phase of construction that will limit the number of lanes and interchanges with other highways.

Saturday, January 23, 2016 in The Dallas Morning News

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

High-rise apartment buildings in Waikiki, Hawaii with steep green mountains in background.

Study: Maui’s Plan to Convert Vacation Rentals to Long-Term Housing Could Cause Nearly $1 Billion Economic Loss

The plan would reduce visitor accommodation by 25% resulting in 1,900 jobs lost.

April 6, 2025 - Honolulu Civil Beat

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 10, 2025 - Diana Ionescu

Streetcar and bus stopped at station on Market Street in San Francisco with Ferry Building visible in background.

Waymo Gets Permission to Map SF’s Market Street

If allowed to operate on the traffic-restricted street, Waymo’s autonomous taxis would have a leg up over ride-hailing competitors — and counter the city’s efforts to grow bike and pedestrian on the thoroughfare.

1 hour ago - San Francisco Examiner

Parklet with wooden benches and flower boxes on street in Ireland.

Parklet Symposium Highlights the Success of Shared Spaces

Parklets got a boost during the Covid-19 pandemic, when the concept was translated to outdoor dining programs that offered restaurants a lifeline during the shutdown.

2 hours ago - Streetsblog San Francisco

Bronze statue of homeless man (Jesus) with head down and arm outstretched in front of St. Matthew Cathedral in Washington D.C.

Federal Homelessness Agency Places Entire Staff on Leave

The U.S. Interagency Council on Homelessness is the only federal agency dedicated to preventing and ending homelessness.

3 hours ago - The New York Times