State highway

By this meaning a state highway is a road maintained and numbered by the national government rather than local authorities.

For example, the longest highway in the state of São Paulo, the Rodovia Raposo Tavares, is designated as SP-270 and SP-295.

There is also the national transcontinental Trans-Canada Highway system, which is marked by distinct signs, but has no uniform numeric designation across the country.

This makes Canada unique in that national highway designations are generally secondary to subnational routes.

The responsibility for road planning, construction and maintenance is vested in the federal states of Germany.

The Strade Statali, abbreviated SS, is the Italian national network of state highways.

From 1928 until 1946 state highways were maintained by Azienda Autonoma Statale della Strada (AASS).

The nomenclature of the state highways managed by ANAS generally follows the SS n scheme, where n is a number ranging from 1 (Aurelia) up to 700 (of the Royal Palace of Caserta) depending on the date of establishment of the state highway.

State highways that cross towns with a population of at least 10,000 inhabitants are urban roads (type D and E) under the jurisdiction of the relevant municipalities.

The state highway that cross towns or villages with a population of less than 10,000 inhabitants are urban roads (type D and E) under the jurisdiction of the municipality, subject to authorization from ANAS.

The speed limit for most state highways is 100 km/h, with reductions when one passes through a densely populated area.

State roads (Turkish: Devlet yolu) are primary roads, mostly under the responsibility of General Directorate of Highways (KGM) except in metropolitan city centers where the responsibility falls into the local government.

The default marker is a white circle containing a black sans serif number (often inscribed in a black square or slightly rounded square), according to the Manual on Uniform Traffic Control Devices (MUTCD).