War Museum, Cambodia

Besides the main interprovincial traffic artery connecting the capital Phnom Penh with Sihanoukville, resurfacing a former dirt road with concrete / asphalt and implementation of 5 major river crossings by means of bridges have now permanently connected Phnom Penh with Koh Kong and hence there is now uninterrupted road access to neighboring Thailand and their vast road system.
Cambodia's road traffic accident rate is, by world standards, high. In 2004, the number of road fatalities per 10,000 vehicles was ten times higher in Cambodia than in the developed world, and the number of road deaths had doubled in the preceding three years.
The nation's extensive inland waterways were important historically in international trade. The Mekong and the Tonle Sap River, their numerous tributaries, and the Tonle Sap provided avenues of considerable length, including 3,700 kilometers (2,300 mi) navigable all year by craft drawing 0.6 meters (2 ft) and another 282 kilometers (175 mi) navigable to craft drawing 1.8 meters (6 ft).
Cambodia has two major ports, Phnom Penh and Sihanoukville, and five minor ones. Phnom Penh, located at the junction of the Bassac, the Mekong, and the Tonle Sap rivers, is the only river port capable of receiving 8,000-ton ships during the wet season and 5,000-ton ships during the dry season. With increasing economic activity has come an increase in automobile and motorcycle use, though bicycles still predominate. "Cyclo" (as hand-me-down French) or Cycle rickshaws are an additional option often used by visitors.