Democrat Timothy M. Kaine, Republican Jerry W. Kilgore and the questioners at their debate referred often to transportation projects in the Virginia suburbs. Here's some of what they did and didn't mention.

Widening I-66 Kilgore pledged repeatedly to widen the interstate "inside the Beltway." Commuters who live outside the Beltway, and who lean Republican in elections, hope this would ease traffic congestion where the highway narrows. Arlington residents, who lean Democratic, have opposed a wider highway in their midst.

Rail to Dulles Raised in questions. A project to extend Metrorail from West Falls Church to Dulles International Airport and beyond would be one of the most expensive transportation programs in the nation. Planners have broken it into two phases because of the $4 billion cost estimate. The first phase takes rail through Tysons Corner. The project has widespread support among leaders in both parties but contains political risks: Drivers on Dulles Toll Road are paying higher fees because of it.

River Crossing Kilgore pledged to build a new Potomac crossing, a longstanding proposal with backing in both political parties. Longstanding drawback: Eventually, planners would have to pick a route through a developed part of Northern Virginia. Rep. Frank R. Wolf (R-Va.), who had encouraged a study of the idea, abandoned it after homeowners along a potential route became alarmed.