Trunk Road A3
The A3 highway is indicated in orange.
Route information
Length	1,502 km (933 mi)
Major junctions
South end	A2 – Port Harcourt
Major intersections	A2 – Port Harcourt A1 – Aba, Nigeria A7 – Umuahia A344 – Okigwe A1 – Enugu A342 – Ngwo A3 – Makurdi A3 – Lafia A3 – Jos A3 – Bauchi A3 – Potiskum A4 – Damaturu A4 – Maiduguri
Northeast end	– Gamboru, Cameroon
Location
Country	Nigeria
Major cities	Port Harcourt Aba Umuahia Okigwe Enugu Ngwo Makurdi Lafia Jos Bauchi Potiskum Damaturu Maiduguri Gamboru
Highway system
Transport in Nigeria
← A2 → A4

The A3 highway is a major arterial road in Nigeria, connecting the city of Port Harcourt in the south to the Cameroon border at Gamboru in the northeast. It is a transportation route, serving several cities and regions in Nigeria.

The A3 highway spans approximately 1502 kilometers. It starts from Port Harcourt in the south and heads north, passing through several cities and regions, including Aba, Umuahia, Okigwe, Enugu, Ngwo, Makurdi, Lafia, Jos, Bauchi, Potiskum, Damaturu, Maiduguri, and finally reaching Gamboru in the northeast at the Cameroon border.

The highway eventually crosses the border into Cameroon at Gamboru and connects to N'Djamena, the capital of Chad.

On May 9, 2014, the bridge linking Gamboru to the rest of Nigeria, as well as the immigration checkpoints of both Cameroon and Nigeria, was destroyed in an attack by Boko Haram militants.^[1][2]

As a result of the bridge's destruction, hundreds of heavy-duty trucks transporting commodities between Chad and Nigeria were left stranded on both sides of the bridge.^[3]

On May 13, 2014, the House of Representatives called on the Federal Government to rebuild the Gamboru Bridge, which serves as a crucial link between the border town and other parts of Borno State.^[4]

On February 9, 2020, a tragic massacre occurred on the A3 highway in Auno, located between Damaturu and Maiduguri.^[5]

5°16′26″N 7°19′38″E / 5.27395°N 7.327115°E / 5.27395; 7.327115