Skip to Content
Streetsblog USA home
Streetsblog USA home
Log In
Around the Block

Don’t Judge Transit By the Gridlock on Nearby Roads

Transit does not exist to make gridlock disappear for drivers. Image: Sound Transit

Sound Transit is beginning to build a light rail line between downtown Seattle and its booming eastern suburbs. It's expected to eventually carry 50,000 riders each day. Parts of the route will run on highways, and the expectation is that the rail line will "[cut] down on the volume of motor traffic," as Linda Poon wrote in a recent story on CityLab.

This is often how transit projects are framed -- as congestion reducers -- and that's a problem, says The Urbanist's Doug Trumm: "Congestion relief is how someone who does not actually ride light rail would likely define success, but the primary job of light rail is to serve transit users, not motorists."

Instead, Trumm proposes five criteria for evaluating transit projects:

1. Does it save existing transit users time and improve the experience?2. Does it attract new riders?3. Does it empower better land use decisions and encourage walkability?4. Does it reduce car dependency?5. Does it create resiliency in the network?

Building light rail between downtown Seattle and its eastern suburbs does all of these things, he writes. It offers a massive speed upgrade to transit riders and provides an alternative to taking a car or bus across Lake Washington. Plus, the light rail line will encourage walkable development in the growing downtowns of Redmond and Bellevue.

Transit can be a success without making car trips faster. After all, even places with frequent, reliable, high-ridership transit systems still struggle with traffic, Trumm says. Unless the roads are priced to manage demand, traffic congestion won't go away, with or without good transit.

More recommended reading today: Curbed has the latest on a plan for wider sidewalks and a protected bike lane on a mile-long street in Midtown Atlanta. BikePortland looks at how bicycle safety efforts take a wrong turn when they place the burden on bike riders, rather than fixing the dangerous streets that prevent more people from biking in the first place. And Stop and Move finds that Fresno's promised "high-frequency" overnight bus service is leaving riders stranded.

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

Three Theories About Why U.S. Car Crash Deaths Are Plummeting

Car crash deaths are down by 12 percent, a top group estimates — but why?

March 4, 2026

Wednesday’s Headlines Don’t Got a Fast Car

If Tracy Chapman had saved "just a little bit of money" these days, she'd be in trouble.

March 4, 2026

Dear Trump: the Future Belongs to the Efficient

Trump abandoned climate protection goals claiming that cheap fossil fuel helps consumers and the economy. A mobility-focused analysis shows that he is wrong: resource efficiency is the key to health, economic success and happiness.

March 4, 2026

Tuesday’s Headlines Are a Little Bit Safer

Traffic deaths are down about 12 percent, which the National Safety Council attributes to new technology and infrastructure investments.

March 3, 2026

Could Refurbished E-Bikes Be the Secret Weapon of the Livable Streets Movement?

A high-quality used market could be the boost America needs to get would-be riders off the sidelines and into the saddle, a new report argues.

March 3, 2026

How the ‘Little Free Pantry’ Can Help Feed the Hungry Without Requiring Them to Drive

Researchers are trying to reduce the mobility barrier to food by bringing it directly to neighborhoods.

March 3, 2026
See all posts