Winston Churchill Avenue is an arterial road

Arterial road

An arterial road, or arterial thoroughfare, is a high-capacity urban road. The primary function of an arterial road is to deliver traffic from collector roads to freeways, and between urban centres at the highest level of service possible. As such, many arteries are limited-access roads, or feature...

 in the British overseas territory

British overseas territories

The British Overseas Territories are fourteen territories of the United Kingdom which, although they do not form part of the United Kingdom itself, fall under its jurisdiction. They are remnants of the British Empire that have not acquired independence or have voted to remain British territories...

 of Gibraltar

Gibraltar

Gibraltar is a British overseas territory located on the southern end of the Iberian Peninsula at the entrance of the Mediterranean. A peninsula with an area of , it has a northern border with Andalusia, Spain. The Rock of Gibraltar is the major landmark of the region...

.

It is the only road in and out of the territory, connecting it with Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

. Once the customs are crossed, the avenue becomes the dual carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

  CA-34 (former national road N-351).

The road intersects the runway

Runway

According to ICAO a runway is a "defined rectangular area on a land aerodrome prepared for the landing and take-off of aircraft." Runways may be a man-made surface or a natural surface .- Orientation and dimensions :Runways are named by a number between 01 and 36, which is generally one tenth...

 of the Gibraltar Airport

Gibraltar Airport

Gibraltar Airport or North Front Airport is the civilian airport that serves the British overseas territory of Gibraltar. It is owned by the Ministry of Defence for use by the Royal Air Force as RAF Gibraltar. Civilian operators use the airport; currently the only scheduled flights operate to the...

; movable barricades close when aircraft

Aircraft

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

 land or take off. In 2009, the Government of Gibraltar announced that a new highway will be built in order to avoid the crossing of the airport runway. The new road, a dual carriageway, will link the customs checkpoint with Devil's Tower Road, crossing the airport runway underground, through a 350-metre tunnel.