Imagining Alternatives to an Enlarged I-90 Viaduct in Boston

Massachusetts Department of Transportation plans to heighten and widen the Allston section of I-90 viaduct do not align with the community's desire for an environmentally friendly and pedestrian- and cycling-oriented new solution.

1 minute read

August 31, 2020, 7:00 AM PDT

By Lee Flannery @leecflannery


Allston Interchange

Massachusetts Department of Transportation / Allston I-90 Project

The Allston section of I-90, a stretch of viaduct wedged between Boston University and the Charles River, was opened 55 years ago. The highway constitution project bisected a lower-income community and damaged riverfront habitat. Boston, Brookline, and Cambridge are still paying the price for what Bradley Campbell and Richard Dimino call "failed transportation policy that placed a highway above the needs of neighborhoods and the environment."

Now the viaduct needs to be replaced. "Nearly all stakeholders, including the city of Boston, agree that we should pursue a strategy for I-90 that plans for our future transportation needs, not reprise last-century’s failed approaches to create a new, bigger viaduct," write Campbell and Dimino. 

Still, MassDOT's “Modified Highway Viaduct” option takes that very approach, heightening and widening the viaduct.

Campbell and Dimino stress that better options exist. A Better City, led by Dimino, has proposed an at-grade design that adds trees and a living shoreline to the pedestrian and bike access space running along the river. "This improved surface option is also designed to ensure that two-track commuter rail service on the Worcester Line remains in service during construction," they say.

Governor Charlie Barker should step up and give "Boston and the region a western gateway equal to its aspirations as a leader in urban design, transportation vision, and environmental planning," Campbell and Dimino assert.

Saturday, August 22, 2020 in CommonWealth

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

Cover CM Credits, Earn Certificates, Push Your Career Forward

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 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.

July 9, 2025 - Diana Ionescu

Map of Haussmann's redesign of Paris in the 1850s through 1870s under Napoleon III.

In Urban Planning, AI Prompting Could be the New Design Thinking

Creativity has long been key to great urban design. What if we see AI as our new creative partner?

June 30, 2025 - Tom Sanchez

Adult holding hands of two children, all wearing winter coats, in crosswalk in New York City during holidays with trees decorated with lights in background.

Pedestrian Deaths Drop, Remain Twice as High as in 2009

Fatalities declined by 4 percent in 2024, but the U.S. is still nowhere close to ‘Vision Zero.’

1 hour ago - Streetsblog USA

View of dense apartment buildings on Seattle waterfront with high-rise buildings in background.

King County Supportive Housing Program Offers Hope for Unhoused Residents

The county is taking a ‘Housing First’ approach that prioritizes getting people into housing, then offering wraparound supportive services.

July 11 - Real Change

Aerial view of suburban housing near Las Vegas, Nevada.

Researchers Use AI to Get Clearer Picture of US Housing

Analysts are using artificial intelligence to supercharge their research by allowing them to comb through data faster. Though these AI tools can be error prone, they save time and housing researchers are optimistic about the future.

July 11 - Shelterforce Magazine