route as well as the port to handle more mainline vessels.
There is congestion through Phnom Penh and there have been proposals for a ring road, although trade moving along the corridor tends to be to from the city, rather than passing through.
There is unlikely to be significant road freight traffic from Thailand to Ho Chi Minh City, as most trade uses the maritime connection. Development of a bypass may be important domestically, but its significance on trade development is more difficult to assess.