18 Facts About Controlled-Access Highways


A controlled-access highway is a type of highway which has been designed for high-speed vehicular traffic, with all traffic flow and ingress/egress regulated.

A highway is any public road or other public way on land.

Mumbai-Ahmedabad Expressway Road Accident by IBN Lokmat


Common English terms are freeway, motorway and expressway.

ГАИ и знак Автомагистраль. И электровелосипед. by Rustlerghost


Other similar terms include Interstate and parkway.


Some of which may be limited-access highways, although this term can also refer to a class of highway with somewhat less isolation from other traffic.

A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, and partial controlled access highway, is a highway or arterial road for high-speed traffic which has many or most characteristics of a controlled-access highway, including limited or no access to adjacent property, some degree of separation of opposing traffic flow, use of grade separated interchanges to some extent, prohibition of some modes of transport such as bicycles or horses, and very few or no intersecting cross-streets.


In countries following Vienna convention, the motorway qualification implies they are forbidden for walking or parking, and reserved for the use of motorized vehicles only.


A controlled-access highway provides an unhindered flow of traffic, with no traffic signals, intersections or property access.

Traffic lights, also known as traffic signals, traffic lamps, traffic semaphore, signal lights, stop lights, robots, and traffic control signals, are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic.

In the abstract, property is that which belongs to or with something, whether as an attribute or as a component of said thing.


They are free of any at-grade crossings with other roads, railways, or pedestrian paths, which are instead carried by overpasses and underpasses across the highway.

A road is a thoroughfare, route, or way on land between two places that has been paved or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse.

A tunnel is an underground passageway, dug through the surrounding soilrock and enclosed except for entrance and exit, commonly at each end.

An overpass is a bridge, road, railway or similar structure that crosses over another road or railway.


Entrances and exits to the highway are provided at interchanges by slip roads, which allow for speed changes between the highway and arterial roads and collector roads.

A collector road or distributor road is a low-to-moderate-capacity road which serves to move traffic from local streets to arterial roads.


On the controlled-access highway, opposing directions of travel are generally separated by a median strip or central reservation containing a traffic barrier or grass.

Traffic barriers keep vehicles within their roadway and prevent vehicles from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains.

The median strip or central reservation is the reserved area that separates opposing lanes of traffic on divided roadways, such as divided highways, dual carriageways, freeways, and motorways.


Elimination of conflicts with other directions of traffic dramatically improves safety and capacity.


Controlled-access highways evolved during the first half of the 20th century.


Italy opened its first autostrada in 1924 connecting Milan to Varese.

Milan is a city in Italy, capital of the Lombardy region, and the most populous metropolitan area and the second most populous comune in Italy.

Varese is a city and comune in north-western Lombardy, northern Italy, 55 kilometres north of Milan.

Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe.


Germany began to build its first 30-kilometre autobahn controlled-access highway without speed limits in 1932 between Cologne and Bonn.

Road speed limits are used in most countries to set the maximum speed at which road vehicles may legally travel on particular stretches of road.

The Federal City of Bonn is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of 311,287.

Cologne is the largest city in the German federal State of North Rhine-Westphalia and the fourth-largest city in Germany.


It then rapidly constructed a nationwide system of such roads in anticipation of their use in the Second World War.

World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.


The first North American freeways opened in the New York City area in the 1920s.

The City of New York, often called New York City, New York, or simply The City, is the most populous city in the United States.

North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere.


Britain, heavily influenced by the railways, did not build its first motorway, the Preston By-pass, until 1958.

The Preston By-pass was Britain's first constructed motorway, designed and engineered by Lancashire County Council surveyor James Drake as part of a larger initiative to create a north-south motorway network that would later form part of the M6 motorway.


Most technologically advanced nations feature an extensive network of freeways or motorways to provide high-capacity urban travel, or high-speed rural travel, or both.


Many have a national-level or even international-level system of route numbering.

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