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Traction control system
The traction control system (TCS), also known as acceleration slip regulation or anti-slip regulation, is an electronic safety system that reduces wheel spin by cutting engine torque or braking spinning wheels.
Tractor
A tractor is a self-propelled vehicle that pulls or powers farm and industrial implements, replacing horses as the main source of farm power in the twentieth century.
Traffic
Traffic is the movement of vehicles, pedestrians, and cyclists along streets and highways, studied by engineers through flow rate, speed, and density to understand congestion.
Traffic assignment
Traffic assignment is the final step of the four-step travel demand forecasting process, allocating origin-destination trips to routes through a road network to produce estimated traffic volumes on each link.
Traffic calming
Traffic calming is the use of mainly physical road features, such as speed humps, chicanes, and street narrowings, to reduce vehicle speeds and improve safety for pedestrians and bicyclists.
Traffic collision
A traffic collision, also called a motor vehicle accident, is when a road vehicle strikes another vehicle, pedestrian, cyclist, animal, or object, killing about 1.16 million people yearly.
Traffic collision reconstruction
Traffic collision reconstruction is the forensic process of determining how a road collision happened, working backward from skid marks, vehicle damage, and event data recorder data.
Traffic cone
A traffic cone, also called a road cone or traffic pylon, is a cone-shaped device placed on roads or footpaths to temporarily redirect traffic around roadwork and hazards.
Traffic conflict technique
The traffic conflict technique (TCT) is a road safety method that measures near-collision events, called traffic conflicts, instead of waiting years for actual crashes to accumulate.
Traffic congestion
Traffic congestion, also known as traffic jams, is a condition in which excess vehicles on a roadway slow speeds below normal, often degrading into stop-and-go traffic.
Traffic count
A traffic count is a transportation engineering measurement of vehicles or pedestrians passing a point on a road, producing average daily traffic figures used for planning, design, and traffic management.
Traffic Engineering Handbook
The Traffic Engineering Handbook is a professional traffic engineering reference published by the Institute of Transportation Engineers, now in its seventh edition, co-edited by Anurag Pande and Brian Wolshon.
Traffic in Towns
Traffic in Towns is a British government report on motor traffic in towns, published in November 1963 and known as the Buchanan Report after its author, Colin Buchanan.
Traffic light
A traffic light, or traffic signal, is a device at intersections and crossings that uses red, yellow, and green lights to assign the right-of-way to vehicles and pedestrians.
Traffic Message Channel
The Traffic Message Channel (TMC) is an application of FM Radio Data System that broadcasts real-time traffic and weather information as inaudible digital data, decoded by TMC-equipped navigation systems in the driver's language.
Traffic sign
A traffic sign, also called a road sign, is a sign beside or over a road that regulates, warns, or guides road users, standardized through national manuals.
Traffic signal warrant
A traffic signal warrant is a quantitative criterion in the MUTCD, covering volume, delay, and crashes, used to decide whether a traffic signal is justified.
Traffic state estimation
Traffic state estimation (TSE) is a transportation engineering method that infers real-time flow, density, and speed on road segments from sparse sensor and probe vehicle data.
Traffic wave
A traffic wave is a propagating disturbance in a stream of vehicles, spanning the kinematic waves of the 1955 Lighthill–Whitham theory and the shock waves marking queue edges.
Trafikverket
Trafikverket (the Swedish Transport Administration) is the Swedish government agency responsible for long-term transport planning and the construction, operation, and maintenance of state roads and railways.
Trailer (vehicle)
A trailer is an unpowered vehicle drawn by a powered vehicle, carrying freight, animals, or equipment, with its wheels bearing some or all of the load.
Trailways Transportation System
Trailways Transportation System is a North American association of independently owned motorcoach companies founded in 1936 as the National Trailways Bus System to compete with Greyhound.
Trans-Canada Highway
The Trans-Canada Highway (Route Transcanadienne) is Canada's longest national road, running 7,821 km from St. John's to Victoria through all ten provinces; built between 1950 and 1962, it was the longest national highway in the world.
Trans-European Transport Network
The Trans-European Transport Network (TEN-T) is the European Union's framework for planning railways, ports, and roads across the EU, set out in guidelines first agreed in 1996 and revised in 2024.
Trans-Java toll road
The Trans-Java toll road (Jalan Tol Trans-Jawa) is a network of connected toll roads spanning 1,150 kilometers across Java, Indonesia, from Merak in West Java to Banyuwangi in East Java.
Trans-Labrador Highway
The Trans-Labrador Highway (TLH), also called the Labrador Highway, is the primary public road of Labrador, running about 1,200 kilometers from Labrador West to Red Bay and fully paved since 2022.
Transantiago
Transantiago is the integrated public transport system of Santiago, Chile, combining private bus operators with the state-owned Metro; its chaotic 2007 launch became a widely studied reform.
Transaxle
A transaxle is a single drivetrain unit combining a vehicle's transmission and differential in one housing; it saves space, aids traction, and gave Porsche's 924, 928, 944, and 968 near-perfect weight balance.
TransCAD
TransCAD is a GIS-based travel demand modeling and transportation planning software package by Caliper Corporation, integrating GIS data management with travel forecasting in one program.
TransCarioca
TransCarioca is a bus rapid transit corridor in Rio de Janeiro, Brazil, running 39 km from Barra da Tijuca to Galeão International Airport across the North Zone, inaugurated in 2014.