US Laws relating to motor vehicle safety have been incorporated in Title 49 of the US Code.
According to the US Code, the term motor vehicle safety means:
"The performance of a motor vehicle or motor vehicle equipment in a way that protects the public against unreasonable risk of accidents occurring because of the design, construction,
or performance of a motor vehicle, and
against unreasonable risk of death or injury in an accident, and includes non-operational safety of a motor vehicle."
Similarly, the term motor vehicle means:
"A vehicle driven or drawn by mechanical power and manufactured primarily for use on public streets, roads, and highways, but does not include a vehicle operated only on a rail line."
Motor vehicle safety laws were incorporated with the objective to regulate traffic movements, decrease traffic accidents and the consequential deaths and injuries thereof.