SMART Act

Strengthening Manufacturing and Rebuilding Transit Act of 2011 or SMART Act - Requires the Secretary of Transportation (DOT) to give preference to the award of discretionary or competitive grants, loans, loan guarantees, and lines of credit to transportation infrastructure projects, including the purchase of transit vehicle rolling stock, rail, and supporting equipment, in which manufactured goods to be purchased have a domestic content percentage that: (1) exceeds applicable federal requirements; and (2) in the case of rolling stock, is consistent with industry-recognized standards, if available.

Directs the Secretary to establish a centralized website that provides rules and guidance, waiver notices, and agency actions of the domestic content (Buy America) standards for DOT federal-aid programs.

Requires the Secretary to subject to public notice and comment any request for waiver, and to publication in the Federal Register and notification to Director of the Office of Management and Budget (OMB) of any waiver, of Buy America requirements involving: (1) public transportation projects, (2) AMTRAK acquisition and maintenance of equipment and facilities, and (3) intercity passenger rail service corridor capital assistance projects.

Directs the DOT Inspector General to report annually to Congress on acquisitions funded by federal transportation infrastructure investments that do not comply with Buy American requirements.