Regulations on the installation of road signs is specified in detail in Article 23 of the Law on Road of Vietnam 2024, as follows:
1. The type of road signs are installed
As prescribed in Clause 1 Article 23 of the Law on Road of Vietnam 2024, road signs are installed, including:
– Traffic signal lights;
– Sea road signs, including: signage, prohibition, signs of danger, signs command, signposts, sea women;
– Road markings and other signs on the road surface (collectively, the road markings);
– Pile target, studs, reflective objective, reflective columns Km, piles, H, mold road;
– Wall guards and railings;
– Audio equipment, road signs.
2. Principles of installation of traffic signal lights
Principles of installation of traffic signal lights are specified as follows:
– The lights turned toward the opposite direction and to put in place to participate in road traffic, easy to observe;
– The order of installation of traffic signal lights vertical: a red light above, light yellow in the middle and the green light at the bottom;
– The order of installation of traffic signal lights horizontally: red lights on the left side, light yellow in the middle and the green light in the right direction, go;
– System traffic signal lights after installation is complete to be the investor of management, the organization commissioning in accordance with the requirements the organization of traffic on the roads before the test, put into operation.

3. Principles of installation of road signs
Principles of installation of road signs shall be as follows:
– The sea turns toward the opposite direction;
– Be placed to the right or above the roadway. In some specific cases can put additional signage on the left side in the go to instruction signals to the participants of road traffic;
– Put in the position to participants of road traffic easily observed and performed;
– Accessories used in combination to additional notes types of signs prohibited signs, danger signs command and signposts.
4. Principle layout, road markings
Principle layout, road markings shall be as follows:
– Road markings is a form of road signs is the on the road and on the road works;
– Road markings can be arranged independently and can combine with the sea, road signs or traffic lights.
5. Principles of deposit target, wall protection, studs, reflective objective, reflective columns Km, piles, H, fences, moldy reveal world
Principles of deposit target, wall protection, studs, reflective objective, reflective columns Km, piles, H, fences, moldy reveal gender is defined as follows:
– Pile goal is installed in the ramp dangerous and position needed to guide for participants of road traffic know the road safety and the direction of the route;
– Nails reflector is mounted on the road surface, vertical or horizontal lines to guide the stool lanes;
– The reflector is installed at the place where the route can be confusing toward the road to guide the direction of the car running at night or in foggy conditions, conditions that limit vision;
– Columns Km is installed, ensure the distance between two columns Km adjacent is 1,000 meters, special case, the distance between two adjacent columns have length greater than or less than 1,000 meters. Columns Km is used in the management, operation, mining, construction, renovation, maintenance of roads and locate the incidents: works, traffic jams, accidents, road traffic; help participants in road traffic, determine the distance the ramp;
– Pile H is installed in the range between two columns Km adjacent and ensure the distance between 02 piles adjacent is 100 meters;
In – mold road is a pile mold is placed at the edge of the outermost defining the boundaries of the corridor, road safety horizontally sugar;
– The installation of wall protection, barricades made in accordance with paragraph 3 of Article 24 of the Law on Road of Vietnam 2024;
The installation of signalling equipment, road by the sound follow the instructions of the manufacturer.