Driving

Oklahoma City residents used to 70-mile commutes are turning to carpooling as gas hovers at $4 a gallon. But with the largest land area of any U.S. city, providing public transit remains a major challenge.

City officials and local businesses in Seattle are teaming up to offer cash and prizes to residents who limit their car use this summer.

Forget congestion pricing and higher gas taxes -- accurately priced pay-as-you-go auto insurance might be the best financial incentive tool for encouraging people to change their driving habits.