MCLEAN, Virginia (CNN) -

His car wasn't moving Tuesday, but President Barack Obama was gunning for Republicans.

After testing a car simulator at a research facility here -- an experience he equated to stepping into "Knight Rider" -- the president let loose on GOP lawmakers, saying his opponents were standing in the way of any legislative fixes to the country's problems.

"The American people have to demand that folks in Washington do their job," he said. "Do something: That's my big motto for Congress right now. Just do something."

Despite his rebukes, Obama grudgingly acknowledged House Republicans had accomplished one thing -- passing a measure that would keep money flowing to road and bridge projects when current funding dries up next month.

The plan, expected to pass the House Tuesday, would supply nearly $11 billion for transportation projects, enough to last until roughly next summer. Obama said he'd support the measure.

The president has been calling on Congress to develop a plan to replenish the dwindling Highway Trust Fund, which relies on a gas tax to finance road and bridge construction projects nationwide. The House measure is a far less ambitious proposal than the $302 billion package Obama offered earlier this year, which would pay for transportation projects by closing tax loopholes.

"All this does is set us up for the same crisis a few months from now," Obama said during remarks at the Turner-Fairbank Highway Research Center, attended by about 150 employees of the facility.

"Congress shouldn't pat itself on the back for averting disaster for a few months, kicking the can down the road for a few months, careening from crisis to crisis when it comes to something as basic as our infrastructure," he said.

Earlier, during a tour of the facility, Obama stepped into the driver's seat of a simulator meant to demonstrate the types of "smart" vehicles being developed at the center, located minutes outside Washington.

He's taken test drives as president before, but the president -- who hasn't been behind a steering wheel regularly since taking office -- said the experience made him a little queasy.

"I think I had a little bit of a lead foot -- I was starting to hit 90," he told a crowd afterwards.

Luckily for GOP lawmakers, the car wasn't headed in their direction. Obama, as he has during recent speeches, mocked his opponents on Capitol Hill for bringing a lawsuit alleging he's overstepped his constitutional bounds by taking executive actions.

"Their big idea has been to sue me. That's what they're spending time on -- a political stunt that wastes America's time and taxpayer dollars," he said.

"I'm not interested in playing political games."