GM Boss Plans Road Trip for Next Washington, D.C., Visit

"That's the primary vehicle," said GM spokesman Tony Cervone in an e-mail, "although he may also spend some time on the route in a [Buick] Lucerne E85 and a [Chevrolet] Cobalt XFE."

The Chevrolet Volt is not part of the fleet.

Wagoner joins Ford CEO Alan Mulally, who is driving a Ford Escape Hybrid to Washington, D.C., as the heads of the Big Three make their second plea before Congress to get $25 billion in government loans. Chrysler CEO Robert Nardelli will not travel by corporate jet, according to the Associated Press, which reports that his travel plans will remain secret for security reasons.

The three executives were roundly criticized by lawmakers for traveling to the nation's capital in private luxury jets during their initial appearances before Congress. The Detroit automakers are asking for bailout loans to help them through the recession and the worst sales slump in 25 years.

In a separate statement on Tuesday, GM announced that it is ceasing corporate aviation operations. "Due to significant cutbacks over the past months, GM travel volume no longer justifies a dedicated corporate aircraft operation," the company said. "GM is currently exploring options for transferring its aircraft to another operator. The company is pursuing sale of four of the aircraft so it can terminate the leases."

Inside Line says: A road trip should make for some more compelling — and humble — photo ops for some of Detroit's top brass. — Anita Lienert, Correspondent