Glossary “road horsepower” Definition:
Horsepower available at the drive wheels of the vehicle.

Glossary “road load” Definition:
Horsepower needed for a vehicle to maintain speed against wind resistance, rolling resistance from the tires and terrain.

Glossary “road test” Definition:
The study which is made by driving the vehicle in order to determine that it is working or not working properly.

Glossary “road draft tube” Definition:
A pre-emission control era device for ventilating the crankcase to the atmosphere; a pipe routed under the chassis at an angle that produces a small vacuum as the vehicle travels forward. Fresh air is drawn in through a mesh filter in the oil filler cap, circulated around inside the crankcase and exhausted through the road-draft tube carrying blowby with it.

Glossary “road feel” Definition:
Term that relates to the driver’s ability to sense the vehicle’s directional control from the movement transmitted through the steering wheel by the front wheels; not as sensitive on power-steering equipped vehicles.