Transport in Cambodia

Asian Highway 1 (AH1) is the longest east–west route of the Asian Highway Network, running from Tokyo, Japan via the Korean Peninsula (South Korea and North Korea), China (Mainland China and Hong Kong), Mainland Southeast Asia (Vietnam, Cambodia, Thailand, and Myanmar), the South Asia (India, Bangladesh, and Pakistan), and the Iranian Plateau (Afghanistan and Iran) to the international border between Turkey and Bulgaria west of Istanbul where it joins European route E80, running all the way to Lisbon, Portugal.

Wikimedia list article

Port in Cambodia

overview of road signage in Cambodia

Cambodia vehicle license plates