P5: Occupant's Motor Vehicle Unit Number

Definition:

The unique number assigned for this crash to the motor vehicle in which this person was an occupant.

Element Attribute:

Number to indicate in which motor vehicle the occupant was located.

Rationale:

Important to link occupants back to motor vehicles in which they were riding. Necessary, for example, to evaluate the effect motor vehicle type and specific make/model have on occupant protection effectiveness and injury status.