The New Traffic Forecast: Modest Growth, then Decline

Clark Williams-Derry shares news of what he calls "far and away the most responsible official traffic forecast I’ve seen from any government agency, ever."

1 minute read

October 21, 2014, 10:00 AM PDT

By James Brasuell @CasualBrasuell


Houston's downtown skyline

D.L. / Flickr

The forecast in question is a transportation revenue forecast [pdf] recently published by the Washington State Office of Financial Management.

"Their forecast from last September, in pink, assumed that traffic would grow endlessly, much as it did during the 1950s through 1990s," writes Williams-Derry. "But the new forecast, in blue, assumes that the modest traffic growth of the past decade will continue, and will then be followed by a slight decline."

As for why the forecast is significant, Williams-Derry explains: "When you find yourself in a hole, the first step is to stop digging. And that’s exactly what this new forecast does: it helps transportation policymakers stop digging all of us deeper into highway-fueled debt."

Tuesday, October 21, 2014 in Sightline Daily

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

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 16, 2025 - Diana Ionescu

Black and white photos of camp made up of small 'earthquake shacks' in Dolores Park in 1906 after the San Francisco earthquake.

The 120 Year Old Tiny Home Villages That Sheltered San Francisco’s Earthquake Refugees

More than a century ago, San Francisco mobilized to house thousands of residents displaced by the 1906 earthquake. Could their strategy offer a model for the present?

April 15, 2025 - Charles F. Bloszies

Ken Jennings stands in front of Snohomish County Community Transit bus.

Ken Jennings Launches Transit Web Series

The Jeopardy champ wants you to ride public transit.

April 20 - Streetsblog USA

Close-up on BLM sign on Continental Divide Trail in Rawlins, Wyoming.

BLM To Rescind Public Lands Rule

The change will downgrade conservation, once again putting federal land at risk for mining and other extractive uses.

April 20 - Public Domain

Calvary Street bridge over freeway in Indianapolis, Indiana.

Indy Neighborhood Group Builds Temporary Multi-Use Path

Community members, aided in part by funding from the city, repurposed a vehicle lane to create a protected bike and pedestrian path for the summer season.

April 20 - Smart Cities Dive