Otoyol routes in Turkey follow a regional based two-digit numbering system.

Motorways that start in the Marmara Region are all single digit.

Motorways that start in The Central Anatolia Region have a first digit of two.

The motorways extended to 28 of the country's 81 provincial-level administrative divisions.

[2] As of October 2024, there are 3,796 km of toll motorways network (otoyollar) in service.