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Merritt Parkway
The Merritt Parkway is a 37.5-mile limited-access parkway carrying Connecticut Route 15 across Fairfield County, completed in 1940 and known for its Art Deco bridges.
Metalsa
Metalsa is a Mexican manufacturer of structural automotive components, specializing in chassis structures for light and commercial vehicles, headquartered in Monterrey and owned by Grupo Proeza.
METANET
METANET is a macroscopic second-order traffic flow model and simulation program for motorway networks, developed by Markos Papageorgiou and Albert Messmer and first published in 1990.
Metro Transit (Minnesota)
Metro Transit is the public transit operator for the Minneapolis–Saint Paul metropolitan area, providing buses, light rail, and bus rapid transit as a division of the Metropolitan Council.
Metrobús Quito
Metrobús Quito is the bus rapid transit system of Quito, Ecuador, whose first corridor, the Trolebús, opened in 1995, making Quito the first city outside Brazil to replicate Curitiba's BRT model.
Mexican federal highway system
The Mexican federal highway system, or Red Carretera Federal, is the network of roads under federal jurisdiction in Mexico, measuring 52,044 km in 2024, of which 11,496 km were tolled.
MG 07 (vehicle)
The MG 07 is a mid-size new energy liftback coupé from SAIC Motor's MG brand, launched in China in 2026 in electric and plug-in hybrid versions.
MG 4X
The MG 4X is a compact battery-electric SUV built by SAIC Motor under its MG brand, launched in China in May 2026 as the first SUV in the MG4 family.
MG Cars
MG Cars is a British automotive marque, short for Morris Garages, founded in Oxford in 1924 and known for lightweight sports cars like the MGA and MGB.
MG F / MG TF
The MG F and MG TF are two-seat mid-engined roadsters built by the British MG marque from 1995 to 2011, the best-selling British two-seater of its era.
MG MGA
The MG MGA, also sold as the MG A, is a British sports car made at Abingdon, England, from 1955 to 1962, with more than 100,000 built.
MG MGB
The MG MGB, also known as the MG B, is a two-seat British sports car made from 1962 to 1980, the most numerous model in MG's history.
MG Midget
The MG Midget is a small, light, front-engined two-seat roadster built by MG at Abingdon, Oxfordshire, from 1961 to 1979, beginning as a MG-badged version of the Austin-Healey Sprite.
MG Motor
MG Motor is the automotive business behind MG, a British car marque founded in Oxford in 1924 as Morris Garages and owned since 2007 by China's SAIC Motor.
MG Rover Group
MG Rover Group was a British car manufacturer based at Longbridge, Birmingham, that built vehicles under the MG and Rover brands from May 2000 until collapsing into administration in April 2005.
MG4 EV
The MG4 EV, also sold as the MG4 Electric, is a compact electric hatchback produced by SAIC Motor under the MG marque, launched in Europe in September 2022 and Europe's top-selling compact electric car in 2023.
MGS5 EV
The MGS5 EV, sold in China as the MG ES5, is a rear-wheel-drive compact electric SUV from MG that debuted in October 2024 and reached Europe and Australia in May 2025.
Michigan Department of Transportation
The Michigan Department of Transportation (MDOT) is the Michigan state agency responsible for the nearly 10,000-mile state highway system and transportation programs for aviation, rail, and transit.
Microcar
A microcar is a very small, low-powered automobile. The type emerged in postwar Europe with vehicles like the BMW Isetta, and today most EU microcars are approved as quadricycles.
Micromobility
Micromobility is the use of small, lightweight, low-speed vehicles, either nonelectric or electric, including bicycles, scooters, mopeds, and skateboards, for short trips, including shared rental fleets.
Microsurfacing
Microsurfacing is a preventive maintenance treatment for asphalt pavements, mixing polymer-modified asphalt emulsion, aggregate, and filler on site into a thin layer that fills ruts and seals cracks.
Mid-size car
A mid-size car, or intermediate car, is a passenger vehicle larger than a compact car and smaller than a full-size car, the US class of the Toyota Camry and Honda Accord.
Mid-size pickup truck
A mid-size pickup truck is a pickup between compact and full-size in size and capacity, typically towing 3,500 to 7,700 pounds; models include the Toyota Tacoma and Ford Ranger.
Milan Area C
Milan Area C is a congestion charge zone in central Milan, Italy, launched in January 2012, requiring most vehicles to pay a fee to enter the city center.
Mild hybrid
A mild hybrid is an internal-combustion vehicle with a small 48-volt electric motor that assists the engine and recovers braking energy but cannot drive on electricity alone.
Milepost
A milepost is a marker placed along a road, railway, or waterway at a known distance from a starting point, letting any location on the route be described by a single number.
Milford Road
The Milford Road is the 119 kilometer section of State Highway 94 running from Te Anau to Milford Sound in Fiordland, New Zealand, the sound's only road access.
Military truck
A military truck is a motor vehicle of military design, built to military specifications to support combat and tactical operations or troop training, ranging from the jeep to heavy cargo tractors.
Milliarium Aureum
The Milliarium Aureum, or golden milestone, was a gilded monument erected by Augustus in the Roman Forum in 20 BC as the notional point where Italy's roads converged.
Milling and resurfacing
Milling and resurfacing is a pavement rehabilitation method in which a cold milling machine removes asphalt to a controlled depth and a new hot mix asphalt layer is placed.