BOSTON (CBS) – Boston is one of the ten most traffic-congested cities in the country, coming in at number five in a new survey.

According to the Transportation Institute at Texas A & M University, Washington, DC is number one.

Check: Traffic Update

The institute’s annual Urban Mobility Report says Americans spent more than five billion hours sitting in traffic in 2011.

Check: Boston area results (.pdf)

But we are adapting.

The report says, on average, we’re allowing an hour for a trip that would take twenty minutes without traffic.

Massachusetts Transportation Administrator Frank DePaola isn’t surprised that Boston is number 5.

“Massachusetts is not like a lot of the Midwest. We don’t have a lot of room for building new roads or additional roads,” he says.

He says there are plans for improvement, including more widening of I-95 south of Boston, which is expected to be done in a couple years. He says open toll roads are expected in three years.

The governor is also asking for 320 million dollars to improve the cloverleaf between I-95 and I-93 in Woburn.

“We’re looking to address chronic congestion locations,” says DePaola.

WBZ NewsRadio 1030′s Carl Stevens reports

According to the institute, clogged roads cost Americans $121 billion in time and fuel.

WBZ-TV’s Christina Hager contributed to this report.