Assertion: semitrailer | /r/CapableOf | mount on same level
Facets:
Source sentences:
text: Every trailer and semitrailer shall be equipped with an electric turn signal device which indicates the intention of the driver to turn to the right or to the left in the form of flashing red or amber lights located at the rear of the vehicle on the side toward which the turn is to be made, and mounted on the same level and as widely spaced laterally as practicable.