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Road Terms

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Term Description


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

Cafe Racer

A style of bike popularized in London in the '50s.


In a disk brake, a housing for cylinder, pistons and brake shoes, connected to the hydraulic system. The caliper holds the brake shoes so they straddle the brake disc.


Maintaining your speed through a turn by accelerating, and un-accelerating without using the brake.


The basic auto frame, which includes the engine, suspension, wheels, brakes and drive train.

Christmas Tree

An electronic starting device incorporating calibrated lights displaying a visual countdown for each driver, activated by a designated official.


A tool that connects and disconnects the wheels from the engine allowing the gears to interchange.

Clutch dust

Carbon dust created by the wearing of the surface of the clutch discs as they slide together during the clutch lockup process.

Contact Patch

The area of a tire's tread that is in contact with the ground.


The shaft that transmits power from the pistons to the differential.


A crosswalk is either (a) that portion of a roadway included within the prolongation or connection of the boundary lines of sidewalks at intersection where the intersecting roadways meet at approximately right angles, except the prolongation of such lines from an alley across a street or (b) any portion of a roadway distinctly indicated for pedestrian crossing by lines or other markings on the surface. There shall not be a crosswalk where signs have been placed indicating no crossing.

Crotch Rocket

A term to describe a high-performance motorcycle.

Dead Heading

Operating a truck without cargo.


The action of slowing down.


The action of disengaging the clutch.

Deep staged

A driver is deep staged when, after staging, he or she rolls a few inches farther, which causes the pre-stage light to go out. In that position, the driver is closer to the finish line, thus helping a shorter run but also dangerously close to a foul start.

Delta Milage

The milage, to the hundreth of a mile.

Demand Responsive Vehicle

A nonfixed-route, nonfixed-schedule vehicle that operates in response to calls from passengers or their agents to the transit operator or dispatcher.


The final link in the drive train, which transmits power to the wheels.

Double Wishbone Suspension

A system of independent suspension in which each wheel is located on a "knuckle" that is connected by ball joints to an upper A arm and a lower A arm. Usually, the lower A arms are longer. This system provides minimal changes in track and camber when the suspension is under load, as when going over bumps or in hard cornering.

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