MAP-21

[AI summary unavailable — showing source text] Moving Ahead for Progress in the 21st Century or MAP-21 - Authorizes appropriations out of the Highway Trust Fund (HTF) (other than the Mass Transit Account) equal to current federal highway spending levels plus inflation for FY2012 and FY2013 for: (1) certain new and existing core federal-aid highway programs, and (2) Federal Highway Administration (FHWA) administrative expenses. Prescribes obligation ceilings for federal-aid highway and highway safety construction programs, with specified exceptions. Revises the National Highway System (NHS) program. Permits conventional combination vehicles to operate on all NHS segments, except those as of enactment of MAP-21: (1) that were open to traffic, and (2) on which all nonpassenger commercial motor vehicles are banned. Amends the Surface Transportation Assistance Act of 1982 to repeal the National Network (a national truck route, including the Interstate System (IS) and certain parts of the federal-aid primary system.) Directs the Secretary of Transportation (DOT) to distribute federal-aid highway funds apportioned to states for each fiscal year: (1) among the national highway performance (new core program), the transportation mobility…