Reason Foundation
Mobility Project

Traffic Congestion in America's Cities

How bad will traffic congestion be in 2030? How much construction and how many new lane miles will each state and major city need to add over the next 25 years to prevent severe congestion? And how much will it all cost? The Reason Foundation study Building Roads to Reduce Traffic Congestion in America's Cities: How Much and at What Cost? and its addendum, A Detailed State-by-State Analysis of Future Congestion and Capacity Needs, provide in-depth answers to these questions.


Traffic Congestion in 2030, by State

States on this map are ranked by the cost of lane miles that need to be built to relieve congestion by 2030. For a detailed look at congestion in any state, click its numbered marker on the map, or click a state on the list on the right of this page. Use controls in the upper left of map to pan and zoom.

(Click here for a map of most congested cities in 2030)

==> States with costs exceeding $10 billion
==> States with costs less than $10 billion

Numbers on map represent the state ranking.
(1 = highest cost)

Source of data: Reason Foundation, Building Roads to Reduce Traffic Congestion in America's Cities: How Much and at What Cost? by David T. Hartgen and M. Gregory Fields. Project Director, Robert W. Poole.


States ranked by total cost of lane miles need to relieve congestion. Click to view details.