Business What Does A ‘No Engine Braking’ Road Sign Mean? A no engine braking road sign warns truck drivers against using the engine to brake. Truck drivers normally downshift the engine to slow the truck down without applying the breaks. This action is referred to as engine braking, and usually produces a loud noise. Consequently, some cities and towns typically put up the ‘no engine […] Written by imesocial July 9, 2020July 9, 2020