TRUE Safety Act

True Understanding of the Economy and Safety Act or TRUE Safety Act - Directs the Comptroller General (GAO), after the Administrator of the Federal Motor Carrier Safety Administration (FMCSA) reports to Congress on an hours of service field study, to assess the methodology followed by the Secretary of Transportation (DOT) in carrying out the efficacy of the restart rule ("Hours of Service of Drivers") published on December 27, 2011, which applies to operators of commercial motor vehicles of property subject to maximum DOT driving time requirements.

Requires the assessment to evaluate the extent to which that methodology meets the requirements of the Moving Ahead for Progress in the 21st Century Act (MAP-21) that: (1) the data collected is representative of the drivers subject to the restart rule, (2) the methodology is statistically valid, and (3) the study followed the FMCSA plan for the "Scheduling and Fatigue Recovery Project."

Directs GAO to assess the Regulatory Impact Analysis that accompanied the final 2011 restart rule.

Nullifies the 2011 restart rule during the period beginning upon enactment of this Act and ending six months after the study report required by this Act has been submitted to Congress.

Prohibits the Secretary from applying the restart rule if the conclusions of the field study completed pursuant to MAP-21 do not support or concur with the conclusions of the laboratory study on which the rule was based.