To amend title 23, United States Code, to provide for mass transportation services that provide temporary substitute highway traffic service as a result of an emergency.

Amends emergency relief fund provisions providing for the repair of highways, roads, and trails damaged as a result of a natural disaster to authorize on or after April 29, 2007, the expenditure of fund amounts for additional mass transportation services, including the operation of traveler information services, provided as temporary substitute highway traffic services on federal-aid highways during a natural disaster emergency.