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Dorna Sports
Dorna Sports is a Spanish sports management and marketing company headquartered in Madrid, holder of the exclusive commercial and television rights to MotoGP motorcycle racing since 1991.
Double wishbone suspension
Double wishbone suspension, also called double A-arm or SLA suspension, is an independent suspension using two wishbone-shaped control arms per wheel, first used in the 1930s by Citroën.
Double-decker bus
A double-decker bus is a bus with two passenger decks, seating 60 to 120 people. The red London double-decker is among the most recognizable vehicles in the world.
Dowel bar retrofit
Dowel bar retrofit (DBR), also called load transfer restoration, is a concrete pavement rehabilitation technique that installs steel dowel bars across transverse joints to restore load transfer between slabs.
Drayage
Drayage, also called cartage or haulage, is the short-haul trucking of freight, typically containers, between an intermodal terminal such as a seaport and a nearby customer facility.
Drive Pilot
Drive Pilot is Mercedes-Benz's SAE Level 3 automated driving system, available on the S-Class and EQS Sedan. Germany approved it in 2021, the first such approval worldwide.
Driveline retarder
A driveline retarder is an auxiliary braking device that slows a commercial vehicle via fluid drag or magnetic eddy currents, keeping the wheel brakes cool on long downgrades.
Driver Alcohol Detection System for Safety
Driver Alcohol Detection System for Safety (DADSS) is a US research program by NHTSA and automakers developing sensors that detect driver intoxication and stop the vehicle.
Driver and Vehicle Licensing Agency
The Driver and Vehicle Licensing Agency (DVLA) is an executive agency of the UK Department for Transport that licenses drivers and vehicles, based in Swansea.
Driver's license
Driver's license (driving licence): official document certifying the right to drive specified vehicle categories, issued after testing. Covers history from Benz's 1888 permit, EU classes, costs, medical standards, international permits, and the 2025 EU digital licence directive.
Driver's licenses in the United States
A driver's license in the United States is a state-issued credential that certifies the holder's privilege to drive and serves as the country's most widely used identity document.
DriveTest (Ontario)
DriveTest is the brand under which Serco Canada delivers driver examination services in Ontario on behalf of the Ministry of Transportation, including knowledge tests, road tests, and application processing.
Drivetrain
A drivetrain, also called a driveline, is the set of components that carries mechanical power from a vehicle's engine or electric motor to its drive wheels, including the transmission, driveshaft, differential, and axles.
Driving
Driving is the controlled operation of a motor vehicle on a road, combining perception, decision-making, and vehicle control, and causing about 1.19 million deaths in 2021.
Driving licence in Brazil
The Carteira Nacional de Habilitação (CNH), Brazil's national driving license, authorizes driving motor vehicles in Brazil, with categories A through E and renewal every 10 to 3 years by age.
Driving licence in France
The driving license in France (permis de conduire) is an official Ministry of the Interior document; the car category is obtainable from age 17 since 2024, and the license carries points.
Driving licence in India
A driving license in India is an official document issued under the Motor Vehicles Act, 1988 that authorizes driving a specified class of vehicle on public roads.
Driving licence in Indonesia
A driving license in Indonesia, the Surat Izin Mengemudi (SIM), is issued by the Indonesian National Police under Law 22/2009, with classes for cars, motorcycles, and heavy vehicles.
Driving licence in Mexico
A driving license in Mexico (licencia de conducir) is issued separately by each of the country's 32 federative entities, with no single national license for private drivers.
Driving licence in New Zealand
A New Zealand driver license, issued by NZTA Waka Kotahi, is the legal permission to drive on New Zealand roads through learner, restricted, and full stages introduced in 1987.
Driving licence in Poland
The driving license in Poland (prawo jazdy) is the EU-format national driving document, issued by the county head after a state theory and practical exam run by WORD centers.
Driving licence in South Korea
A South Korean driving license (운전면허증) is a permit issued by city or provincial police agencies, divided into Class 1 and Class 2 by vehicle type.
Driving licence in Spain
The driving license in Spain (permiso de conducir) is issued by the DGT, with EU-standard vehicle categories and a points system in force since 1 July 2006.
Driving licence in Sweden
The driving license in Sweden, known as körkort, is the national permit to drive motor vehicles, issued after theory and practical tests from age 18.
Driving licence in the United Kingdom
UK driving licence: DVLA-issued document for Great Britain (DVA for Northern Ireland), covering provisional-to-full licensing, A/B/C/D vehicle categories, 10-year renewals, fees, medical rules and post-Brexit exchange and IDP rules.
Driving licence in Turkey
The driving license in Turkey, or sürücü belgesi, is issued by provincial population directorates of the Ministry of Interior, with classes aligned to the EU model since 2016.
Driving under the influence
Driving under the influence (DUI), also called driving while intoxicated, is operating a motor vehicle while impaired by alcohol or drugs or above a legal blood alcohol limit.
DRL Coachlines
DRL Coachlines is a family-owned Canadian motor coach company based in Triton, Newfoundland and Labrador, operating the island's only daily bus service between St. John's and Port aux Basques.
Drop-off system
The drop-off system, also called the marker system, is a navigation method for group motorcycle rides in which a rotating rider stops at each turn to point the way.
Drowsy driving
Drowsy driving is operating a vehicle while impaired by sleep loss, fatigue, or sleep disorders, which slows reaction time and can end in falling asleep at the wheel.