The Lao and Vietnamese governments are considering the feasibility of building an expressway linking Vientiane to Hanoi, with assistance from the government of Japan. The first route would run through Vientiane-Pakxan-Viengthong-Thanh Thuy-Hanoi over a distance of 725 kilometres, of which 355km would be in Laos. The estimated cost would be US$5.23 billion.
The second route would follow a path through Vientiane-Naphaeng-Xaysomboun-Xieng Khuang-Tha Lao (Huaphan province)-Hanoi, over a distance of 730 kilometres, of which 485km would be in Laos. The estimated cost of this route would be about US$9.27 billion.