Assertion: beeper | /r/HasProperty | required by osha
Facets:
value: with no one on the ground
type: OTHER
value: for earthmoving vehicles
type: PURPOSE
value: to help guide the driver
type: PURPOSE
Source sentences:
text: Back-up beepers or an observer are required by OSHA for earthmoving vehicles with an obstructed view to the rear and no one on the ground to help guide the driver.