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Radar detector
A radar detector, also called a fuzz buster, is a passive radio receiver that alerts drivers to police speed-measuring radar on the X, K, and Ka bands.
Radial tire
A radial tire, also called a radial-ply or steel-belted radial, is a pneumatic tire whose ply cords run at 90 degrees to travel under a circumferential belt.
Railway crossing sign
A railway crossing sign is a traffic control device at highway-rail grade crossings warning road traffic to yield to trains; in the United States it is the X-shaped Crossbuck.
Raised pavement marker
A raised pavement marker is a device at least 10 mm high mounted on a road surface, used as a positioning guide or to supplement or replace pavement markings.
Rajdoot 350
The Rajdoot 350 was an Indian license-built version of the Yamaha RD350B, made by the Escorts Group from 1983 to 1989 and sold with 347 cc two-stroke power.
Raleigh Bicycle Company
Raleigh Bicycle Company is a British bicycle brand founded in Nottingham in the 1880s, once the world's largest bicycle maker and known for the Chopper.
Ram 1500 (DS)
The Ram 1500 (DS) is the fourth generation of Ram's full-size pickup truck, launched as the Dodge Ram 1500 in 2009 and built through 2018, competing with the Ford F-150 and Chevrolet Silverado 1500.
Ram 1500 REV
The Ram 1500 REV is a range-extended electric pickup truck from Stellantis' Ram brand, pairing a 92-kWh battery with a gasoline generator for up to 690 miles of range.
Ram Heavy Duty (fifth generation)
The fifth-generation Ram Heavy Duty is Ram's 2500 and 3500 pickup line, introduced for 2019 around a Cummins diesel that first exceeded 1,000 lb-ft of torque.
Ram pickup
The Ram pickup, sold as the Dodge Ram until 2011, is a line of full-size pickup trucks built by Stellantis, since 2019 America's number-two full-size pickup.
Ram Trucks
Ram Trucks is a truck and commercial vehicle brand of Stellantis, selling pickups like the Ram 1500 and ProMaster vans; it became a stand-alone division in 2009.
Rambler (automobile)
Rambler was an American automobile marque produced from 1902 to 1969, best known for the compact Nash Rambler launched in 1950 and sold by AMC until 1969.
Rambler American
The Rambler American was a compact car built by American Motors Corporation from 1958 to 1969, a revival of the Nash Rambler that helped make AMC profitable.
Ramp meter
A ramp meter is a traffic signal on a freeway on-ramp that releases vehicles one at a time or in small platoons, easing merging and cutting freeway congestion and crashes.
Range extender
A range extender is a small combustion engine fitted to an electric vehicle that only generates electricity, as in the BMW i3, whose 2014 extender roughly doubled its range.
Range Rover
The Range Rover, also sold as the Land Rover Range Rover, is a luxury full-size SUV line built by Land Rover since the original launched in 1970.
Range Rover (L322)
The Range Rover (L322) is the third generation of the Range Rover luxury four-wheel-drive wagon, built by Land Rover in Solihull, England, from 2002 to 2012.
Range Rover (L405)
The Range Rover L405 is the fourth-generation Range Rover luxury SUV built by Land Rover from 2012 to 2021, the first with an all-aluminum body.
Range Rover (P38A)
The Range Rover P38A is the second generation of Land Rover's luxury four-wheel-drive vehicle, built in the United Kingdom from 1994 to 2002 and named after its in-house project code 38A.
Range Rover Classic
The Range Rover Classic is the first-generation Range Rover, a luxury four-wheel-drive SUV built by Land Rover at Solihull from 1970 to 1996 and credited with creating the luxury 4x4 category.
Range Rover Evoque
The Range Rover Evoque is a compact luxury SUV produced by Jaguar Land Rover from 2011 at Halewood near Liverpool, its design influenced by the 2008 LRX concept.
Range Rover Sport
The Range Rover Sport, also known as the Land Rover Range Rover Sport, is a five-seat luxury SUV produced by Land Rover since 2005 as the sportier Range Rover.
Range Rover Velar
The Range Rover Velar is a mid-size luxury SUV produced by Jaguar Land Rover, revealed in March 2017 and slotted between the Evoque and the Range Rover Sport.
Rapido (company)
Rapido, legally Roppen Transportation Services, is an Indian ride-hailing platform founded in Bengaluru in 2015 that provides bike taxi, auto rickshaw, and cab services in more than 100 cities.
Rat rod
A rat rod is a hot rod built in a deliberately rough, unfinished style with primer, bare metal, or surface rust, named by Hot Rod writer Gray Baskerville in the early 1990s.
Ratel IFV
The Ratel, or Ratel20 in its standard variant, is a South African 6x6 wheeled infantry fighting vehicle carrying a 20-mm cannon, in service since 1976 and the first wheeled IFV.
Rawalpindi-Islamabad Metrobus
The Rawalpindi-Islamabad Metrobus, also called the Islamabad Metrobus, is a bus rapid transit line linking Rawalpindi and Islamabad, Pakistan, opened in 2015 with a 22.5 km dedicated corridor.
Rea Vaya
Rea Vaya is a bus rapid transit system in Johannesburg, South Africa, opened in August 2009 as the first full-feature BRT system on the African continent.
Real Driving Emissions
Real Driving Emissions is a European Union type-approval test that measures light-duty vehicle pollutant emissions on the road with onboard PEMS, compulsory for new car approvals since 2017.
Rear mid-engine, rear-wheel-drive layout
The rear mid-engine, rear-wheel-drive layout (RMR, often called mid-engine) places the engine behind the passenger compartment but ahead of the rear axle, favored in sports and racing cars.