Accordingly, the highways recommended to have maximum speed signs of 90km/h include: Lao Cai – Kim Thanh border gate, Cao Bo – Mai Son, Mai Son – national highway 45, national highway 45 – Nghi Son, Nghi Son – Dien Chau, Nha Trang – Cam Lam, Cam Lam – Vinh Hao, Vinh Hao – Phan Thiet, My Thuan – Can Tho.
Leaders of the Vietnam Road Department said that the whole country has a total of about 1,892km of expressway roads that have been put into operation.
“Some high-speed auto routes have diverged investment with 4 lanes with signs posted with a maximum allowable speed of 90km/h such as Tuyen Quang – Phu Tho, Trung Luong – My Thuan, My Thuan – Can Tho sections” , leader of Vietnam Road Department shared.
Nghi Son – Dien Chau Expressway. Photo: TA
Currently, the Vietnam Road Administration is managing and maintaining a section of the expressway with divergent investment, namely the Lao Cai – Kim Thanh section, and other divergent investment expressway sections are planned by the Management Boards. The project is managed by the Ministry of Transport and has not yet been handed over to the highway management agency.
For sections of high-speed motorway routes with divergent construction investment with 4 lanes for motor vehicles to meet operating conditions with a maximum allowable speed of 90km/h, the Vietnam Road Administration recommends that the Ministry of Transport direct Organize the posting of signs with a maximum allowable speed of 90km/h for cars, passenger cars with up to 30 seats (except buses), trucks with a tonnage of less than 3.5 tons, and remaining vehicles. Maintaining the maximum allowed speed of 80km/h. Sign installation in January 2024.
According to the Vietnam Road Administration, the process of exploitation and use requires investors and exploitation management units to continue monitoring traffic organization and traffic safety situation on the route to promptly detect Identify existing problems and shortcomings and report to competent authorities to adjust operating speed and traffic organization plans accordingly to ensure safe and smooth traffic.
Up to now, the Ministry of Transport has requested the Vietnam Road Administration and Vietnam Highway Administration, Construction Investment Management and Project Management Boards of Ho Chi Minh, My Thuan, 2, 6, 7, 85, Thang Long reviewed the divergent investment highway designed with 4 motor vehicle lanes to be able to operate at a speed of 90km/h according to TCCS42:2022.
The Ministry of Transport assigned the Vietnam Road Administration to coordinate with units to review relevant technical factors of investment-phased expressway projects that are in operation or are preparing to invest in 4 lanes. motorbike to evaluate the suitability and decide to increase the operating speed to 90km/h.
According to the system of Vietnamese and international standards and regulations, there are two types of speed: design speed and operating speed.
The design speed is determined and selected during the road construction investment process and is a constant value throughout the construction and exploitation process of the project.
The exploitation speed is determined and selected during the process of organizing and operating the routes and is regularly evaluated to adjust and select appropriate for each stage of exploitation.
Existing national highways have similar conditions to expressways with 4-lane limited investment in phased construction and also allow a maximum speed of 90km/h for some types of vehicles. Some national standards allow the use of a lane width of 3.5m with a design speed of 100km/h.
