Miles or Kilometers are the usual measures of distance when dealing with highways and roads.
Highway patrol officers are members of a highway patrol unit. The highway patrol is a state agency or a separate unit within a police department designated to patrol and police the highway systems.
Gram
It is degrees.
OHM
centimeters
a litre.
Millimeters
A scale.
Power
1 square unit
It is a speed unit; km/hour or mile/hour, ....