Phnom Penh to Chon Buri: Road Trip Guide

This route crosses two nations, from the Mekong's banks to Thailand's eastern seaboard. It runs along National Road 1 (NR1) from Phnom Penh to the Bavet border, then connects via Vietnam's QL22 to the Asian Highway AH1. The total driving distance is about 700 km (435 miles), typically taking 9–12 hours including border crossings and stops.

The route traverses the flat, fertile Mekong Delta in Vietnam with vast rice paddies, then climbs into the forested Cardamom Mountains near the Thai border. The dry season (Nov-Apr) offers clear skies and cooler mornings.

Along the way, you can visit some UNESCO World Heritage Sites – notably the Preah Vihear temple (though it requires a detour) and the ancient Khmer capital of Angkor (via Siem Reap).

For food, stop at local markets: try Cambodia's fish amok and Vietnam's pho. Thai roadside stalls offer som tam and grilled meats. How to find the best stops and hidden gems between cities includes tips for discovering unprompted eateries.

Local commerce thrives at border towns where shops sell duty-free goods. In Aranyaprathet, the Rong Kluea Market is a popular shopping spot for travelers.

Both main road types dominate: NR1 in Cambodia is a two-lane highway with some uneven pavement, while Thailand's Route 33 and 304 are well-maintained multilane roads. Fuel costs vary; petrol in Cambodia is about $1.10/liter, in Vietnam $1.00, and in Thailand $1.20.

Here are key logistics facts:

• Road tolls: Only in Thailand, about 300 THB total for motorway segments near Bangkok.
• Border crossing times: Bavet-Moc Bai (2-3 hrs), Poipet-Aranyaprathet (1-2 hrs) unless you use the new Friendship Bridge bypass.
• Required documents: Passport, vehicle registration, insurance (Cambodian CTPL is valid in Vietnam and Thailand), and an International Driving Permit for Thailand.

Road quality varies; Cambodia's NR1 is decent with some potholes, but Vietnam's roads are smoother. Thailand's highways are excellent. Night driving is risky due to poor lighting and livestock on roads in Cambodia. Plan to drive only during daylight.

For families, there are several child-friendly stops: the Sao La deer exhibit at the national park in Quang Tri (though en route), and the aquarium at Pattaya near Chon Buri. Pet-friendly hotels are common near highways, especially in Thailand, but check ahead.

To manage fatigue, use these rest centers:

• At Bavet, there are 24-hour fuel stations with clean restrooms.
• In Vietnam, the Binh Duong rest stop at km 45 offers food and sleeping areas.
• In Thailand, the Wang Sombun rest area (opposite the 7-Eleven) provides shaded parking and food stalls.

Key safety note: wear seatbelts at all times, and in Thailand, motorcycles often weave through traffic; always check mirrors.