Regional and national elected officials on Monday called for swift progress in extending a light rail line closer to Los Angeles International Airport.

Rep. Peter DeFazio of Oregon, a senior member of the House Transportation and Infrastructure Committee, toured the areas proposed for a Green Line extension near the airport with South Bay Rep. Jane Harman, D-El Segundo.

DeFazio said he would be an advocate to garner much-needed federal funding for the project, but acknowledged he was not sure where the money would come from.

DeFazio called Mayor Antonio Villaraigosa's plan to combine the transportation extension with other area improvements in the next 10 years a "big-bang" approach. The current plan relies on funds from Measure R, a half-cent sales tax approved by Los Angeles County voters in 2008 that will generate $40 billion in the next 30 years.

"These sorts of things are what we really need to do," DeFazio said. "I think taking one of the most congested places in the country and taking a big-bang approach is visionary. The problem is that this hasn't been done before. The federal government hasn't worked with a region on a scale like this."

But Villaraigosa argued Monday that the project needs federal funding so it can be expedited.

"We're the one city in the country that - in the middle of a recession - passed this measure," Villaraigosa said. "With a partnership with the federal government, we could be a blueprint of what other cities should be doing."