4,460 articles
Corporate Average Fuel Economy
Corporate Average Fuel Economy (CAFE) is a US regulatory program requiring automakers to meet average fuel economy targets for new cars and light trucks each model year.
Corredor Norte (Panama)
The Corredor Norte is a toll highway in Panama City running along the city's north side, linking the center to northern suburbs and the Panamá–Colón highway.
CORSIM
CORSIM (CORridor SIMulation) is a microscopic traffic simulation model developed by the US Federal Highway Administration, formed in 1994 by merging NETSIM and FRESIM and distributed as the core of TSIS-CORSIM.
Counterbalancing (motorcycling)
Counterbalancing, also called counterweighting or counter-leaning, is a motorcycle riding technique in which the rider shifts weight to the outside of a turn while the bike leans in, used for slow, tight maneuvers.
Countersteering
Countersteering is the motorcycle technique of briefly steering opposite the intended turn to lean the bike into it, used above roughly 10 to 15 mph.
County State-Aid Highway
A County State-Aid Highway (CSAH) is a Minnesota county highway eligible for state construction and maintenance funding, a system established in 1957 totaling about 30,700 miles.
Coupe
A coupe, also called a fixed-head coupé, is a closed car with a fixed roof and traditionally two doors and a trunk, though the term now stretches to four-door and SUV models.
Courier
A courier is a person or company that carries parcels, documents, or messages directly from sender to recipient, as a paid delivery service distinct from the postal system.
Crankset
A crankset, called a chainset in the UK, is the bicycle part that converts leg force into chain rotation, made of two crank arms and one to three chainrings.
Crash cushion
A crash cushion, also called an impact attenuator, is a roadside safety device placed in front of rigid objects like bridge piers to stop vehicles safely.
Crew cab
A crew cab is a pickup truck cab with four front-opening doors and two rows of seats for five or six people, the dominant configuration in the United States.
Critical gap (traffic engineering)
The critical gap, also called critical acceptance gap, is the minimum time gap an average driver needs to enter or cross a conflicting traffic stream at unsignalized intersections.
Cross-docking
Cross-docking is a logistics strategy in which freight moves from inbound trucks straight to outbound trucks with little or no storage, shortening delivery times and cutting costs.
Crossley Motors
Crossley Motors Limited was a British vehicle manufacturer in Manchester, England, that built cars from 1904 to 1937 and buses, commercial, and military vehicles until 1956, ending under AEC.
Crossover SUV
A crossover SUV, or CUV, is a sport utility vehicle built on a car-like unibody platform rather than a truck-based ladder frame, combining SUV space with car-like fuel economy.
Cruise (autonomous vehicle company)
Cruise LLC was a San Francisco autonomous vehicle company founded in 2013, acquired by General Motors in 2016, and absorbed into GM in 2025 after a 2023 pedestrian incident.
Cruise control
Cruise control, also known as the Speedostat, automatically maintains a speed chosen by the driver; invented by Ralph Teetor, it reached production cars in 1958.
Cruise Origin
The Cruise Origin was an all-electric, driverless robotaxi developed by Cruise with GM and Honda, unveiled in San Francisco in 2020 and canceled in 2024 without carrying fare-paying passengers.
Cruiser Mk I
The Cruiser Mk I, formally Tank, Cruiser, Mark I (A9), was the first British cruiser tank. Built by Vickers-Armstrongs, 125 saw combat in France in 1940 and in North Africa through 1941.
Cruiser Mk II
The Cruiser Mk II, designed as the A10, was a British cruiser tank of the late 1930s, armed with a 2-pounder gun and too slow for its cruiser role.
Cruiser Mk VIII Challenger
The Cruiser Mk VIII Challenger, or Challenger A30, was a British Second World War cruiser tank mounting the 17-pounder gun on a lengthened Cromwell chassis.
Cruiser tank
The cruiser tank, sometimes called the cavalry tank, was a British fast, lightly armored tank of the 1930s and Second World War, designed to exploit breakthroughs.
Crumple zone
A crumple zone is a vehicle body region, front or rear, that deforms in a controlled way during a collision to absorb crash energy and protect occupants.
Cummins X10
The Cummins X10 is a 10-liter inline-six heavy-duty diesel engine made by Cummins to replace the L9 and X12, launching in 2027 with EPA 2027 certification.
Cummins X15
The Cummins X15 is a 15-liter heavy-duty diesel engine built by Cummins for North American on-highway trucks, introduced in 2016 as successor to the ISX15 and rated up to 605 hp.
Cupra (marque)
Cupra, also known as SEAT Cupra, is a Spanish performance car marque created by SEAT within the Volkswagen Group, launched as a standalone brand in 2018 and headquartered at Martorell near Barcelona.
CUPRA Born
The CUPRA Born is a fully electric compact hatchback from CUPRA, SEAT's performance brand within Volkswagen Group, launched in 2021 as the brand's first electric model.
CUPRA Tavascan
The CUPRA Tavascan is CUPRA's all-electric SUV coupé, designed in Barcelona, built in China, and launched in 2024 as the brand's second electric model after the Born.
Curb
A curb, spelled "kerb" in British English, is a raised concrete or stone edge along a roadway that separates traffic from sidewalks and channels stormwater runoff.
Curb extension
A curb extension, also known as a bulbout or neckdown, is a traffic-calming treatment that widens the sidewalk into the parking lane to shorten pedestrian crossings.