Critiquing the Proposal to Locate a Bike Lane on an Interstate

The current plan for the widening of I-66 in Virginia would place a bike lane between vehicle traffic and a sound wall.

2 minute read

June 15, 2017, 7:00 AM PDT

By James Brasuell @CasualBrasuell


I-66 Widening and Bike Lane

MPD01605 / Wikimedia Commons

Canaan Merchant critiques plans "to widen I-66 include building a new bike trail that runs from where the Custis Trail ends in Arlington all the way out to Centreville."

The bike lane would be added to the Outside the Beltway Project—the proposal to widen I-66 that David Alpert critiqued in April 2012. The public-private partnership between the Virginia Department of Transportation (VDOT) and the Department of Rail and Public Transportation (DRPT), and private partner, I-66 Express Mobility Partners, will expand I-66 to ten lanes between Haymarket and Falls Church.

According to Merchant, "one positive aspect is that the project will include a new trail that extends from the Custis Trail, which runs parallel to I-66 in Arlington, from its western end to Centreville (it'd go there at first, but then even farther). The 22-mile extension would make the Custis one of the longest trails in the region, giving a lot of local neighborhoods a new option for biking and walking."

Merchant's argument, however, is that for all the benefits of gaining a new bike trail, this one could be a lot better:

As it is currently planned, the new trail would put trail users in a squeeze, literally. Plans show it running along the highway side of the sound barrier, the big wall that separates 66 from where people live. That means trail users would be closer to high-speed traffic and farther from the neighborhood connections, which likely means far fewer people would be willing to get out and use it. 

To help conjure an idea about what the experience of this trail would be like, the Fairfax Alliance for Better Bicycling created the following visualization.

Merchant has a better idea: "move the trail to the opposite side of the sound wall, and make it at least 12 feet wide."

Wednesday, June 14, 2017 in Greater Greater Washington

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

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.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and "harrowing" close calls are a growing reality.

June 15 - Maine Morning Star

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

June 15 - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

June 15 - The Washington Post