Mariah's Act

[AI summary unavailable — showing source text] Motor Vehicle and Highway Safety Improvement Act of 2011 or Mariah's Act - Authorizes appropriations out of the Highway Trust Fund (HTF) (other than the Mass Transit Account) for FY2012 and FY2013 for specified highway safety programs. Requires state highway safety programs to comply with certain uniform guidelines that meet specified criteria, including requirements for an effective accident record system. Prohibits the Secretary of Transportation (DOT) from approving a state highway program which does not, beginning FY2013, provide for a robust, data-driven traffic safety enforcement program in areas most at risk for accidents. Repeals authority for a grant to states that use a comprehensive computerized safety recordkeeping system designed to correlate data regarding traffic accidents, drivers, motor vehicles, and roadways. Repeals the requirement that the Secretary establish an approval process by which a state may apply for all highway safety grants for which a single consolidated application process with one annual deadline is appropriate. Directs the Secretary to require a state to submit for Secretary approval annual highway safety plans that comply with certain safety perf…