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Rear-engine, rear-wheel-drive layout
The rear-engine, rear-wheel-drive layout, or RR layout, places a car's engine at or behind the rear axle driving the rear wheels, a design of the Porsche 911 and Volkswagen Beetle.
Rear-wheel drive
Rear-wheel drive (RWD) is a drivetrain where engine power goes exclusively to the rear wheels, having been the dominant layout for the first half-century of automotive history.
Rebadging
Rebadging, also called badge engineering, is the practice of selling an existing vehicle under a second brand name with minimal changes, typically the badges and small trim details such as the grille.
Rebels Motorcycle Club
The Rebels Motorcycle Club (Rebels MC) is an outlaw motorcycle club founded in Brisbane, Australia, in 1969, described as Australia's biggest, with chapters in about 20 countries.
Reckless driving
Reckless driving is a traffic offense in which a driver acts with willful or wanton disregard for safety, a mental state above ordinary negligence, defined differently across US states.
Reclaimed asphalt pavement
Reclaimed asphalt pavement (RAP) is crushed and screened old asphalt pavement, reused in new asphalt mixes; the United States reused over 101 million tons in 2024.
Reclaimed asphalt shingles
Reclaimed asphalt shingles are processed roofing shingles from manufacturing scrap or residential tear-offs, ground and added to asphalt paving mixtures, supplying up to 20 percent of the mix's binder.
Rectangular rapid-flashing beacon
A rectangular rapid-flashing beacon, or RRFB, is a pedestrian-actuated US traffic device whose two yellow LED beacons flash rapidly at crosswalks, with motorist yielding rates as high as 98 percent.
Recumbent bicycle
A recumbent bicycle is a bicycle with the rider in a reclined, feet-forward seat instead of a saddle; its lower aerodynamic drag makes it the basis of the fastest human-powered vehicles.
Red Bull Racing RB20
The Red Bull Racing RB20 is the Formula 1 car with which Red Bull Racing competed in the 2024 season, winning 9 races and the drivers' title with Max Verstappen.
Red Bull Racing RB21
The Red Bull Racing RB21 is the Formula 1 car Oracle Red Bull Racing used in 2025, carrying Max Verstappen to second in the drivers' championship.
Red Bull Racing RB22
The Red Bull Racing RB22 is a Formula One car built by Red Bull Racing for the 2026 season, powered by its own DM01 engine and driven by Max Verstappen and Isack Hadjar.
Red Bull RB17
The Red Bull RB17 is a track-only, two-seat hypercar designed by Adrian Newey and built by Red Bull Advanced Technologies, revealed in 2024 with a Cosworth V10 hybrid.
Red-light running
Red-light running is the act of a driver entering an intersection after the traffic signal has turned red; drivers already in the intersection when the signal changes are not violators.
Refrigerated truck
A refrigerated truck, commonly called a reefer truck, is an insulated truck with an onboard refrigeration unit holding temperature-sensitive cargo like food, pharmaceuticals, and medical supplies.
Regenerative braking
Regenerative braking converts a vehicle's kinetic energy into electricity during deceleration, storing it in the battery to extend the range of electric and hybrid vehicles.
Regional Transport Office
A Regional Transport Office (RTO) is a state-level government office in India, operating under the Motor Vehicles Act, 1988, that issues driving licenses, registers vehicles, and collects motor vehicle taxes.
Reliant Regal
The Reliant Regal was a British three-wheeled economy car built by Reliant of Tamworth from 1953 to 1973, ending with the glassfibre Regal 3/25 and 3/30 that preceded the Robin.
Reliant Robin
The Reliant Robin is a British three-wheeled economy car built by the Reliant Motor Company in Tamworth from 1973 to 2002, Britain's best-known three-wheeler, sellable on a motorcycle license.
Rely (威麟) (marque)
Rely (威麟) is a marque of the Chinese automaker Chery, launched in March 2009 for business and mid-to-high-end vehicles and revived in 2025 as a global pickup brand.
Remote assistance
Remote assistance in automated driving is event-driven advice from a remotely located human to a driverless vehicle, which stays in control and never steers or brakes.
Remote keyless system
A remote keyless system lets a key fob lock, unlock, and often start a car without a physical key; the 1982 Renault Fuego was the first.
Renault
Renault, also known as Groupe Renault or Renault Group, is a French multinational automobile manufacturer founded in 1898, selling Renault, Dacia, and Alpine vehicles worldwide.
Renault 12
The Renault 12, also known as the Renault 12 Toros in Turkey, is a front-wheel-drive family car Renault produced from 1969 to 1980, with 4.01 million built in Europe alone.
Renault 21
The Renault 21 is a large family car built by Renault between 1986 and 1995 as the successor to the Renault 18, replaced by the Laguna.
Renault 25
The Renault 25 is a large five-door executive hatchback produced by Renault from 1984 to 1992 as the successor to the Renault 20 and 30.
Renault 4
The Renault 4, also known as the Quatrelle, is a small five-door economy car produced by Renault from 1961 to 1992 and remembered as the first mass-market hatchback.
Renault 5
The Renault 5 is a small three- and five-door hatchback that Renault built from 1972 to 1985, selling about 5.5 million units as the first genuine hatchback supermini.
Renault 5 Turbo
The Renault 5 Turbo, also known as the Renault R5 Maxi Turbo in its final evolution, is a French mid-engine sports hatchback built from 1980 to homologate a rally car.
Renault Alliance
The Renault Alliance, also known as the AMC Alliance, is a subcompact sedan built by AMC in Kenosha, Wisconsin and sold from 1983 to 1987.