National Highway 4 (Cambodia)

National Highway 4 in Chbar Mon in Phnom Penh.

National Highway 4 or National Road No.4 (10004) (in Khmer ផ្លូវជាតិលេខ ៤) is one of the national highways of Cambodia. With a length of 230 km (140 mi), it connects the capital of Phnom Penh with Sihanoukville in the south-west. Sihanoukville is the only international sea port of Cambodia. Consequently, NH4 is one of the most important highways of the country for economical purposes. The road was built in the 1950s coinciding with the construction of the port.

The road was built especially for the transport of merchandise between the capital and the port by heavy trucks and containers. Portions of NH4 are considered a toll road with three stations to collect fees. It is also considered the most dangerous road of Cambodia due to several traffic accidents and little control by authorities.

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, is in the Sangkat 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 to the east beyond to the Vietnamese border is in the territory of Sihanoukville, at Prey Nob District.