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Road Terms

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Term Description


Trucker slang for a low overpass.


An obstruction (e.g., plate or vane) used to slow down or divert the flow of gases, liquids, sound, etc. They are found in the fuel tank, crankcase, muffler, and radiator.

Balance Shaft

A shaft designed so that, as it turns, it counter rotates the rotational direction of the engine crankshaft in a manner that reduces or cancels out some of the vibration produced by the engine.


Trucker slang for a deer

Banked Turn

A turn that's inclined so the outside area is higher than the inside area.


The sloping of a race track, particularly at a curve or corner, from the apron to the outside wall. Degree of banking refers to the height of a track's slope at its outside edge.

Bash Plate

A protective plate placed under the engines of off-road machines. This avoids damage caused by grounding.


Big F$%#ing Truck. An average/large truck that has been lifted and placed on oversized tires and wheels. Usually driven by rednecks or teenage males with ego issues.


1) Any road, path, or way which in some manner is specifically designated as being open to bicycle travel, regardless of whether such facilities are designated for the exclusive use of bicycles or are to be shared with other transportation modes.

Blind Spot

Areas around a commercial vehicle that are not visible to the driver either through the windshield, side windows or mirrors.


The diameter of the cylinder bore.

Brake Master Cylinder

A cylinder containing a movable piston activated by pressure on the brake pedal. The piston produces hydraulic pressure that pushes fluid through the lines and wheel cylinders. This forces the brake lining or pad against the drum or disc to slow or stop the car.


This term refers to a stretch of surface road that connects two different freeways, or two different stretches of a single one, without any direct connection via an interchange. Usually, these roads are filled with traffic lights, gas stations, fast food joints, etc. The original example is in Breezewood, Pennsylvania, where I-70 follows surface US 30 for a quarter mile where it meets the Pennsylvania Turnpike.


A structure that divides compartments. It


A motor vehicle designed to transport 16 or more passengers, including the driver.

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