This is the graph they use to make their case; They conclude with: "Local, state and federal governments should revisit the need for these “legacy projects” and ensure that proposals for new or expanded highways are still a priority in light of recent travel trends. | | Here is what they are saying in the study: The severe economic recession was likely responsible for some of the decline, but not all. Driving started to decline before the start of the recession: The trend toward reduced per-capita Vehicle-Miles Traveled (VMT) began long before the recent recession. Per capita vehicle travel peaked in 2004, while the recent recession did not begin until the fall of 2007. Driving and economic growth have diverged: After moving in lock - step for decades, trends in economic growth and growth in vehicle travel have diverged in recent years, with per-capita GDP generally growing faster than per-capita vehicle travel since the late 1990s, suggesting that economic growth and vehicle travel are no longer as closely correlated as they once seemed to be. Regardless of which scenario proves true, the amount of driving in the United States in 2040 is likely to be lower than is assumed in recent government forecasts. |