Cambodia transportation network includes roads, railways, airports and water networks. The main transportation network. however, are the roads, because most of the activities depend on them and it is also the longest.
Road Network
According to statistics in 1970, Cambodia road network is composed of seven main National Roads:
No.1: Phnom Penh to Bavet, via Neak Leung and Svay Rieng Province, is 167 kilometers long.
No.2: Phnom Penh to Phnom Den, via Takmao and Takeo Province, is 137 kilometers long.
No.3: Phnom Penh to Sihanoukville, via Kampot Province, is 260 kilometers long.
No.4: Phnom Penh to Sihanoukville, via Kampong Speu Province, is 232 kilometers long.
No.5: Phnom Penh to O"Chroav, via Kampong Chhang, Pursat, Battambong and Banteay Meanchey Province, is 408 kilometers long.
No.6: Preak Kdam to Banteay Meanchey Province, via Kampong Thom and Siem Reap Province, is 386 kilometers long.
No.7: Skun to Stung Treng Province, via Snuol, is 543 kilometers long.
Provincial Road
There are 3,200 kilometers of provincial roads that link province town to their districts and communes. The construction and maintenance of these roads is the responsibility of the province.
Bridges
There are 4,027 bridges along all the road networks. Since 1994, the length of Cambodia road networks comprised 4,235 kilometers of National roads and 3,675 kilometers of province road.
Railway Network
Before 1970, the railway network was known as the Royal Railways of Cambodia. The total length of Cambodia railways network is 649 kilometers, and the width of the rail is 1 meter. There are 990 bridge along the railways network. The network includes:
Phnom Penh to Poipet, constructed in 1927; it is 386 kilometers in length.
Phnom Penh to Sihanoukville, constructed in 1958, it is 264 kilometer in length
Airway Network
Cambodia has two international airports: Phnom Penh International Airport and Siem Reap International Airport. Phnom Penh International Airport is the busier of the two airports and it is the primary transit point for international travelers, but air port in Siem Reap plays a key role in accommodating tourists who visit the Angkor Wat Complex. A French foreign investor is responsible for the recent renovation work at both airports. In addition, to the two international airport, Cambodia has eight domestic airports. They are located in Sihanoukville, Koh Kong, Battambong, Preah Vihear, kratie, Stung Treang, Rattanakiri and Mondulkiri Provinces.
Waterway Network
Cambodia is shaped like the bottom of a pan, providing it with a rich water system. Cambodia waterway includes three main system- the Mekong River, The Tonle Sap and the Gulf Waterway.
Mekong River System
Cambodia Mekong River System is composed of the upper Mekong River (Lbakon to Phnom Penh). The lower Mekong River (Phnom Penh to Kaom Samnoh), the Bassac River (Phnom Penh to Chhrey Thom about 100 kilomerters) and aoo of the tributaries of the Mekong River. The source of the Mekong River is in the Tibet Plateau, which is about 5,000 meters above sea level. The Mekong River basin is 800,000 square kilometers. It is 4,200 kilometers in length and flows through Laos, Myanmar, Thailand, Cambodia and Vietnam.
Cambodia portion of the Mekong System is about 500 meters long. It start in Lbakon at the Cambodian Lao border and ends in Kaom Samnor, at the Vietnam border. In between it flows through Stung Treng, Kratie, Kampong Cham, Kandal and Prey Veng Province.
The Great Lake: It is 75 kilometers long and 32 kilometers wide
The Small Lake: It is 35 kilometers long and 28 kilometer wide
The Swamp: It runs from Chhnok Tru to Kampong Chhang. This area has many small Islands.
Phnom Penh Port includes a 184 meter concrete port and 196 meter floating port. The water depth is 5.8 meters in the rainy season and 4.2 meters in the dry season.
Sihanoukville Port is located 226 kilometers from Phnom Penh vis National Road 4 and 263 kilometers from Phnom Penh via the railway. The port was constructed in 1954 and opened in 2960. It is 350 meters long and 28 meter wide.
Tonle Sap System
The Tonle Sap System is composed of the Tonle Sap River and The great Lake Tonle Sap. The Tonle Sap River is about 100 kilometers long. It starts in Phnom Penh and runs to Kampong Chhang. The Great Lake Tonle Sap is 150 kilometers long and 32 kilometers wide. The lake is divided into three parts:The Great Lake: It is 75 kilometers long and 32 kilometers wide
The Small Lake: It is 35 kilometers long and 28 kilometer wide
The Swamp: It runs from Chhnok Tru to Kampong Chhang. This area has many small Islands.
Gulf Waterways System
Generally waterways along the gulf are short and filled with water that flows from the Cardamon Mountains. The region includes a waterfall which gushes during the rainy season, causing a brief flood. The water profile is affected by the monsoon, which is why some of the tributaries dry up during the dry season. The main waterway systems along the gulf include Stung Meteuk, Prek Taki, Stung Cheay Areng, Prek Chi Phat, Prek Kampong Som, Stung Kampot and Stung Tuk Meas.
Ports
Cambodia has two international ports-in Phnom Penh and in Sihanoukville. Both have a key role in the transportation of commodities and tourists.Phnom Penh Port includes a 184 meter concrete port and 196 meter floating port. The water depth is 5.8 meters in the rainy season and 4.2 meters in the dry season.
Sihanoukville Port is located 226 kilometers from Phnom Penh vis National Road 4 and 263 kilometers from Phnom Penh via the railway. The port was constructed in 1954 and opened in 2960. It is 350 meters long and 28 meter wide.