National Highway 4 or National Road No.4 (10004) (in Khmer ផ្លូវជាតិលេខ ៤) is one of the national

highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-acces ...

s of

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...

. With a length of ,Discovering Sihanoukville Municipality, p. 665, in "Cambodia in the Early 21st Century", Phnom Penh, 2004, it connects the capital of Phnom Penh with Sihanoukville in the south-west. Sihanoukville is the only international sea port of Cambodia, making NH4 one of the country's most important highways. The road was built in the 1950s, coinciding with the construction of the port. The road was built especially for the transport of goods between the capital and the port, by heavy trucks and containers. Portions of NH4 were considered

toll roads A toll road, also known as a turnpike or tollway, is a public or private road (almost always a controlled-access highway in the present day) for which a fee (or '' toll'') is assessed for passage. It is a form of road pricing typically implemente ...

, with three stations to collect fees. All toll stations have now been removed, the entire road is now toll free. It is also considered the most dangerous road in Cambodia due to the occurrence of several traffic accidents and limited management by authorities. Furthermore, the road is congested and in need of maintenance.

Description

The road begins at the junction of Pochentong Avenue and National Highway 3. The junction, located in western Phnom Penh near the

Phnom Penh International Airport Phnom Penh International Airport ( km, អាកាសយានដ្ឋានអន្តរជាតិភ្នំពេញ; french: Aéroport international de Phnom Penh) is the busiest and largest airport in Cambodia, occupying a land ar ...

, is in the

Sangkat Administrative divisions of Cambodia have several levels. Cambodia is divided into 24 provinces (''Khaet''; km, ខេត្ត, ) and the special administrative unit Phnom Penh. Though a different administrative unit, Phnom Penh is at provin ...

Chaom Chau – Dangkor District. The road initially heads westerly then curves toward the south west. After the first toll station, NH4 enters Kandal Province. It then crosses Kampong Speu, Koh Kong and Sihanoukville provinces. In the territory of Koh Kong, at Chamkar Luong, National Road 48 branches off west toward Koh Kong town and the Thai border. The junction with NH3, which leads to

Kampot Kampot may refer to: *Kampot (city), a city in southern Cambodia *Kampot, an alternative spelling of the Slavic drink Kompot *Kampot Province, province of Cambodia * Kampot Municipality, a municipality in Cambodia * Kampot Airport, an airport in Ca ...

to the east beyond to the

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

ese border is in the territory of Sihanoukville, at Prey Nob District.

Phnom Penh-Sihanoukville Expressway

A 190 km long expressway parallel to highway 4 is under construction, it will be Cambodia's first expressway. The expressway is built through Chinese investment at a cost of $2 billion under a build-operate-transfer contract by

China Road and Bridge Corporation China Road and Bridge Corporation (CRBC), a subsidiary of Fortune Global 500 company China Communications Construction Company (CCCC), focuses on global civil engineering and construction projects such as highways, railways, bridges, ports, and ...

. The completion is planned for 2023.

References

Roads in Cambodia {{Cambodia-transport-stub