The Ministry of Transport has proposed three scenarios for investment in and the construction of the North-South high-speed railway line, including a scenario of running mixed passenger and cargo trains at a speed of 350 kph. According to experts, nowhere in the world has permitted the operation of mixed trains with such a speed. The operation of passenger trains and the provision for freight transport in the future, when needed, under this scenario is therefore impossible. Furthermore, Vietnam is yet to master high-speed railway technology to allow a speed of 350 kph, so will be dependent on foreign countries both in the construction stage and in operations. Experts recommend selecting investment scenarios that are both feasible and suitable for the country’s situation.