Have U.S. Light Rail Systems Been Worth the Investment?

Five U.S. metros (Buffalo, Portland, Sacramento, San Diego, and San Jose) opened light rail systems in the 1980s to great fanfare. The mode offered many of the benefits of subway systems for far less public money; San Diego's system, per mile, cost about one-seventh of Washington, D.C.'s Metrorail. Light rail cities like Portland became transportation models for the country, pointing toward a transit-friendly urban future.

Thirty years later, light rail remains the most appealing mode of new public transportation for many American cities. Billions of local, state, and federal dollars have been invested in 650 miles of new light rail lines in 16 regions, and today 144 miles of additional lines are under construction at a cost of more than $25 billion. Many more lines are planned. No region has invested in a new heavy rail subway system, on the other hand, since 1993.