WASHINGTON — The growing traffic between the United States and its international neighbors is sparking more interest in border crossings, but revenue studies for tolls should be conservative, the Kansas City, Mo.-based engineering firm HNTB stresses in a new white paper.

Nearly 93 million personal vehicles entered the U.S. in 2011, according to the Department of Transportation’s Bureau of Traffic Statistics. About 31.6 million came from Canada and 61.2 million from Mexico. This large flow of traffic can lead to massive congestion, sometimes taking hours to enter or exit the U.S. at the busiest crossings.

Subscribe Now

Independent and authoritative analysis and perspective for the bond buying industry.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.