Placement Of Traffic Signs

Generally speaking, traffic signs should be placed on the right side of the road where they can be easily recognized. In addition to the relevant road number and its directional signs, traffic signs for different purposes should be installed separately with different support structures.

Traffic signs may also be placed on the left side of the roadway or on the center median when restricted by topography, obstructions, or right-turning flat curves.

Traffic signs requiring different response actions should be spaced apart from each other.

Reasonable spacing between traffic signs is determined by the relevant speed (e.g., speed limit or 85th percentile speed).

In order to ensure adequate visibility and readability of traffic signs and the reaction time of road users, traffic signs should be placed to meet the following five requirements:

1. Traffic signs should be placed in the road lateral clear zone “outside or set up disintegration energy dissipation or deformable pillars;

2. Maximize nighttime visibility;

3. Minimize the impact of splashing dirt and debris;

4. traffic signs are not obscured from each other;

5. traffic signs are not obscured by other obstructions.

When there is a large number of traffic signs or limited terrain area, the priority of the signs in question is determined by their importance.

The prioritization of traffic signs depends entirely on the traffic conditions and the desire to erect traffic signs.

Since the importance of prohibition and warning is much greater than that of directional signs, the former should be prioritized and placed as far as possible in obvious, critical locations.

Care should be taken to avoid placing too many signs at the same or similar locations.

For traveling road users, their eyesight and comprehension are limited, too much information will affect their ability to make the correct response.

Signs should be oriented so that the front face is perpendicular to the direction of traffic flow.

For traffic signs placed outside the lateral clear zone or on curves, the angle of the sign should be adjusted so that it faces the direction of traffic flow.

On longitudinal slopes, traffic signs may be appropriately angled forward or backward to improve viewing angles.