Truck Safety





Transportation Terms - Q R



Relay (Relay Driving) Common practice in the less-than-truckload industry, in which one driver takes a truck for 8 to 10 hours, then turns the truck over to another driver, pony express style.

Reefer Refrigerated trailer with insulated walls and a self powered refrigeration unit. Most commonly used for transporting food.

Retarder Device used to assist brakes in slowing the vehicle. The most common type of retarder on over-the-road trucks manipulates the engine's valves to create engine drag. (This type is commonly referred to as "Jake Brake" because the predominant manufacturer is Jacobs Vehicle Equipment Co.) Other types of retarders include exhaust retarders, transmission-mounted hydraulic retarders and axle-mounted electromagnetic retarders.

RFG (Reformulated Gasoline) Gasoline blended with pollution reducing additives. Common in the Milwaukee metro area..

Rider Policy  A policy the company might have that allows someone, not employed by the company, to ride along with you. Typically limited to certain times of year (April to November) and limited to age of rider. The Policy might also stipulate the person must be an immediate family member only. 

Rolling Radius Tire dimension from center of the axle to the ground; measured with tire loaded to rated capacity. Used in calculating geared speed.

RPM (Revolutions Per Minute) Measure of the speed at which a shaft spins. Most often used to describe engine crankshaft speed. Indicated by a tachometer.

Runaway Truck Ramp Emergency area adjacent to a steep downgrade that a heavy truck can steer into after losing braking power. Usually two or three lanes wide and several hundred feet long, the ramp is a soft, gravel-filled pathway which absorbs the truck's forward momentum, bringing it to a safe stop. Depending on the surrounding terrain, the ramp may be level or run up or down hill. Forklift Safety


Add or Remove Link

Enter URL


Company Name


Add Link

Remove Link


Send a Comment



Or Contact


This site is a collection of information which may be of benefit to workers or individuals driving trucks, operating a forklift, lift truck, crane or other industrial equipment or working in a manufacturing, agricultural, logistics or transportation environment similar to that described herein. It is not intended to be accurate training material or legal guidance but hopes to shed light on more common and serious safety issues in industry and often affecting the general public.


The Occupational Health and Safety Act, Regulation and Code require an employer to take every precaution reasonable in the circumstances for the protection of a worker to show due diligence in the workplace. Regulation for Industrial Establishments, Regulation 851 is more specific about industrial hazards and the Highway Traffic Act and Federal Motor Carrier Safety Regulations govern activities on the roadway to promote road safety.


Various Government, Public and Safety Association links are supplied to help direct inquiries to proper authorities as well as Forms and Documents commonly used in Business and Industry.


Directory lists of Trucking Companies, Mapping and Tracking Services, Trucking Compliance Software, Truck and Fuel Stops, as well as Weather and News sources are provided for convenience.