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Road Traffic Safety Law of the People's Republic of China
The Road Traffic Safety Law of the People's Republic of China is the national statute governing road traffic in mainland China, adopted in 2003 and effective May 1, 2004.
Road train
A road train, or long combination vehicle, is a truck towing two or more trailers, used at scale in remote Australia to haul cattle and freight.
Road transport
Road transport, also called road transportation, is the movement of people and goods over roads using wheeled vehicles such as animal-drawn carts, cars, buses, and trucks.
Road Transport Department
The Road Transport Department, known in Malay as Jabatan Pengangkutan Jalan (JPJ), is Malaysia's agency for vehicle registration and driver licensing under the Road Transport Act 1987.
Roads and Highways Department (Bangladesh)
The Roads and Highways Department (সড়ক ও জনপথ অধিদপ্তর), or RHD, is the Bangladeshi government agency that plans, builds, and maintains the national road and bridge network, established in 1962.
Roads in India
Roads in India, the Indian road network, form the world's second largest road system, carrying 65 percent of freight and 80 percent of passenger traffic.
Roads in Romania
Roads in Romania form a public network of about 86,847 km (2024), organized by law into motorways, express roads, European, main, and secondary national roads, and administered nationally by CNAIR.
Roads: Buraq → Dionysias
Roads: Buraq → Dionysias is a hypothetical Roman road in southern Syria heading south from Buraq to Dionysias, linked to an archaeologically attested segment near Umm ez-Zeitun/Omra.
Roads: Dionysias → Salamanestha
Roads: Dionysias → Salamanestha is a hypothetical Roman secondary road in southern Syria from Dionysias (es-Suweida) to Salamanestha (Sala/Saleh), per Barrington Atlas Map 69 and Bauzou 1985.
Roadside barrier
A roadside barrier is a safety device along a highway that contains or redirects errant vehicles, shielding them from hazards like steep slopes, trees, and bridge piers.
Roadside Design Guide
The Roadside Design Guide is an AASHTO manual presenting recommended practice for roadside safety, including the clear zone concept and barrier guidance, first published in 1989.
Roadside drug testing
Roadside drug testing is the on-site screening of drivers for recent drug use, usually by saliva swab, followed by laboratory confirmation when positive; used in Australia, Belgium, and New Zealand.
Robert Dunlop
Robert Dunlop, born Stephen Robert Dunlop, was a Northern Irish motorcycle road racer who won 5 Isle of Man TT and a record 15 North West 200 races.
Rocker (subculture)
Rockers, called Ton-up Boys in the 1950s, were a British youth subculture of motorcycle-riding, leather-clad fans of American rock and roll, famous for clashes with the mods.
Rodovia BR-319
Rodovia BR-319, officially the Rodovia Álvaro Maia, is an 885 km Brazilian federal highway linking Manaus to Porto Velho, one of the Amazon's most contested infrastructure projects.
Rodovia Fernão Dias
Rodovia Fernão Dias, officially BR-381/MG/SP, is a federal toll highway in Brazil linking Belo Horizonte in Minas Gerais to the São Paulo metropolitan region over 562 km.
Rodovia Transamazônica
Rodovia Transamazônica, officially BR-230, is a Brazilian federal highway crossing the country east-west through seven states. Opened in 1972, it was designed under the Médici military government as the centerpiece of the Program of National Integration.
Rollcage
A rollcage, also known as a safety cage or safety cell, is a multi-tubular structure fitted in a competition car's cockpit to protect occupants during rollovers and serious accidents.
Roller brake
The roller brake is a Shimano cable-operated drum brake for bicycles, in which rollers press steel shoes against a drum inside the hub; it appeared in 1995 as the INTER-M.
Roller-integrated compaction
Roller-integrated compaction, originating in Europe as continuous compaction control and now called intelligent compaction, lets vibratory rollers measure soil stiffness in real time using accelerometers and GPS.
Rolling coal
Rolling coal, also called rolling coal, is the practice of modifying a diesel truck to emit large plumes of black exhaust smoke at other road users.
Rollover protection system
A rollover protection system is a combination of strong roof structures, rollover-activated side curtain airbags, deployable convertible roll bars, and electronic stability control that prevents rollovers entirely.
Rolls-Royce Corniche
The Rolls-Royce Corniche is a hand-built two-door luxury car produced from 1966 to 1995 as the coupé and convertible derivatives of the Silver Shadow, with 7,370 built.
Rolls-Royce Cullinan
The Rolls-Royce Cullinan is a full-size super-luxury SUV produced by Rolls-Royce at Goodwood, England. Launched in 2018, it is the marque's first SUV, named after the Cullinan Diamond.
Rolls-Royce Ghost
The Rolls-Royce Ghost is a four-door luxury saloon built at Goodwood, England, launched in 2009 as the smaller sibling of the Phantom and the marque's best-selling model.
Rolls-Royce Motor Cars
Rolls-Royce Motor Cars is a British luxury automobile manufacturer, wholly owned by the BMW Group, that designs and hand-builds Rolls-Royce cars at Goodwood in West Sussex, England, since 2003.
Rolls-Royce Motors
Rolls-Royce Motors was the British motor car business separated from the aero engine manufacturer in 1971, which built Rolls-Royce and Bentley cars at Crewe until 2002.
Rolls-Royce Phantom
The Rolls-Royce Phantom is the flagship saloon of Rolls-Royce Motor Cars, hand-built at Goodwood, England, and produced across eight generations since 1925, reaching its centenary in 2025.
Rolls-Royce Phantom IV
The Rolls-Royce Phantom IV is a state limousine chassis built between 1950 and 1956, of which only 18 were made, nearly all for royalty and heads of state.
Rolls-Royce Phantom VIII
The Rolls-Royce Phantom VIII is the eighth generation of the Phantom, a full-size ultra-luxury saloon unveiled in 2017, built at Goodwood, and the only Rolls-Royce with the Gallery art display.