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Road transport

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DARPA Urban Challenge 2007

The DARPA Urban Challenge was a 2007 competition in which eleven teams drove fully autonomous vehicles through simulated city traffic in Victorville, California, for a $2 million prize.

Darrell Ward

Darrell Ward (1964–2016) was an American long-haul truck driver from Montana, known as "the Montana Legend" on the History Channel series Ice Road Truckers, which he joined in 2012.

Daseke

Daseke was a North American flatbed and specialized trucking company founded by Don Daseke in 2008, serving industrial customers until its 2024 acquisition by TFI International.

Dashboard

A dashboard, also called an automobile instrument panel, is the panel facing a vehicle's driver that carries instruments, warning lights, and controls for operating the vehicle.

Dashcam

A dashcam, also called a dashboard camera or driving recorder, is a small video recorder mounted in a vehicle that records the road, preserving accidents as evidence.

DATEX II

DATEX II is the European CEN standard for exchanging road traffic and travel information between traffic control centers, service providers, and other actors such as car park operators.

Datsun (ダットサン)

Datsun (ダットサン) is a Japanese automobile brand created by Nissan's predecessor companies in the early 1930s, used for exports until the 1980s and revived for entry-level cars from 2013 to 2022.

Datsun 510

The Datsun 510 was a compact rear-wheel-drive sedan, coupe, and wagon built by Nissan from 1967 to 1973 as the third-generation Bluebird, known for its racing success and affordability.

Datsun Sports

Datsun Sports, also known as the Datsun Fairlady, is a series of open sports cars built by Nissan from 1959 to 1970 and exported as the Datsun 1500, 1600, and 2000.

Day cab

A day cab is a semi-truck tractor built without a sleeping compartment behind the driver's seat, designed for local and regional hauling where drivers return home each shift.

Daytime running lamp

A daytime running lamp (DRL), also called daytime running lights, is a vehicle lamp that switches on automatically to make cars more visible in daylight.

Daytona International Speedway

Daytona International Speedway, known as the World Center of Racing, is a motorsports complex in Daytona Beach, Florida, opened in 1959, hosting the Daytona 500 and Rolex 24.

De Tomaso

De Tomaso is an Italian sports car manufacturer founded in Modena in 1959 by Argentine racing driver Alejandro de Tomaso, best known for the Ford V8-powered Pantera.

De Tomaso Mangusta

The De Tomaso Mangusta is a mid-engined Italian sports car built in Modena from 1967 to 1971, with a Ford V8 and Giugiaro body; 401 were made.

De Tomaso Pantera

The De Tomaso Pantera is a mid-engined sports car built by Italy's De Tomaso from 1971 to 1993, pairing an Italian body with a Ford V8.

Death of Harry Dunn

The death of Harry Dunn was the 2019 killing of a 19-year-old British motorcyclist in a head-on collision with a car driven by Anne Sacoolas outside RAF Croughton.

Decade of Action for Road Safety

The Decade of Action for Road Safety 2011–2020 was a United Nations-proclaimed global initiative to stabilize and reduce road traffic deaths through five pillars of action.

Dedicated short-range communications

Dedicated short-range communications (DSRC) is a 5.9 GHz wireless technology for vehicle-to-vehicle, vehicle-to-infrastructure, and pedestrian safety messaging, based on IEEE 802.11p Wi-Fi in the United States.

Deepal E07

The Deepal E07, sold in China as the Changan Nevo E07, is a battery-electric and extended-range crossover SUV produced since 2024 by Deepal, Changan Automobile's electric-vehicle brand.

Deepal G318

The Deepal G318 (深蓝G318) is a five-seat extended-range electric SUV from Changan's Deepal brand, launched in Tibet in June 2024 and named after China National Highway 318.

Deepal S05 (深蓝S05)

The Deepal S05 (深蓝S05) is a compact five-seat crossover SUV from Deepal, the new-energy brand of China's Changan Automobile, sold as a battery-electric or range-extended version since its October 2024 launch.

Deepal S07

The Deepal S07, also sold as the Shenlan S7, is a mid-size battery electric SUV built by China's Changan Automobile, and the first Deepal model in the UK, arriving in September 2025.

Deepal SL03 (深蓝SL03)

The Deepal SL03 (深蓝SL03), also called Shenlan SL03, is a mid-size liftback sedan from Deepal, the new energy brand of China's Changan Automobile, launched in 2022.

Defensive driving

Defensive driving, also called safe driving, is a style of driving that uses anticipation and space management to prevent collisions despite other drivers' actions or adverse conditions.

Delahaye

Delahaye was a French automobile manufacturer founded by engineer Émile Delahaye in Tours in 1894, best known for the 1930s luxury and competition cars built on its Type 135 chassis.

Delaware Department of Transportation

The Delaware Department of Transportation, known as DelDOT, is Delaware's cabinet-level transportation agency, created in 1976, which plans, builds, and maintains state highways, transit through DART First State, and motor vehicle services.

Delhi–Amritsar–Katra Expressway

The Delhi–Amritsar–Katra Expressway, also known as the Delhi–Katra Expressway, is a 670 km greenfield expressway in India linking Delhi with Amritsar and the pilgrimage town of Katra.

Delhi–Meerut Expressway

The Delhi–Meerut Expressway is an 82 km access-controlled expressway connecting Sarai Kale Khan in Delhi with Meerut in Uttar Pradesh, cutting travel time to about 45 minutes.

Delhi–Mumbai Expressway (दिल्ली–मुंबई एक्सप्रेसवे)

The Delhi–Mumbai Expressway (दिल्ली–मुंबई एक्सप्रेसवे) is an under-construction 8-lane access-controlled expressway in India connecting Delhi with Mumbai, India's longest at about 1,320 km, built to cut the journey from 24 hours to about 12.

Delineator

A delineator is a retroreflective device mounted on posts along the side of a road, in a series, to show drivers the roadway alignment, staying visible in rain or snow.