Hybrid HOV Access Act of 2004

[AI summary unavailable — showing source text] Hybrid HOV Access Act of 2004 - Amends the Federal Aid Highways program to require a State agency that has jurisdiction over the operation of a HOV facility to establish the occupancy requirements of vehicles operating on the facility. Requires such agency to permit motorcycles and bicycles to use the HOV facility. Permits a State agency to restrict use of the HOV facility by motorcycles or bicycles (or both) if it certifies to the Secretary of Transportation that such use would create a safety hazard. Prescribes guidelines under which a State agency may permit use of an HOV facility by: (1) public transportation vehicles and high occupancy toll vehicles; (2) inherently low-emission vehicles and low emission and energy-efficient vehicles; and (3) advanced lean burn technology vehicles. Permits tolls to be charged on a HOV facility on the Interstate System. Requires a State agency that allows low-emission and energy-efficient vehicles to use a HOV facility to certify to the Secretary that it will establish: (1) a continuous monitoring, assessment, and reporting program regarding the impacts such vehicles may have on the operation of the facility and adjacent highways; and (2) an enf…