The Otoyol (Plural: Otoyollar) is the national network of controlled-access highways in Turkey.

As of December 2023, there are 3,726 km of otoyol in service, the network passes through 28 provinces out of 81 in Turkey.

By the 1960s, traffic problems were becoming prevalent in large cities and capacity on intercity roads needed to be upgraded.

Plans to build new expressways were put into action in 1968, when construction of the Istanbul Inner Beltway was started.

The Istanbul Beltway was then to be a part of a large expressway spanning from Edirne, in East Thrace, to İskenderun, on the eastern shore of the Mediterranean Sea.

Construction of this expressway first started in 1973 on a 14 km (8.7 mi) section between Pozantı and Akçatekir, on what would become the O-21.

Due to financial problems during the following years, construction of the two otoyols were greatly slowed down.

[1] Turgut Özal became Prime Minister in 1983 and brought forth a policy of constructing new otoyols in Turkey.

In 1985, construction of an intercontinental motorway spanning 772 km (480 mi) from Edirne to Ankara was started.

Cash, OGS (active RFID) and KGS (card) methods have been abolished in recent years.

[9] Mainly because the country already has a wide network of double carriageways, the standards for motorways in comparison are very high.

Dangerous stretches such as tunnels or bridges where there is often fog, exits, interchanges and service areas are illuminated.