Roads are designed to ensure safe and smooth traffic for vehicles with certain specifications. In principle, vehicles that do not meet size and weight requirements are not allowed to be on the road because they can potentially damage the roads and disrupt traffic.
However, road administrators are empowered to give permission to vehicles that exceed the size or weight regulation to use the road, only if the road administrator acknowledges that there are no alternatives after examining the vehicle’s structural characteristics and the cargo. In these cases, the road administrator will require that the vehicle meets certain conditions in order to protect the road structure and prevent potential danger to road users.

■On general roads

General limit (upper limit) of vehicles according to Article 3.1, Vehicle Size and Weight Restriction

●Typical special vehicles

■On expressways

Dimension & weight limits for specified
vehicles are more lenient than on general roads

	Length
Semi-trailer	16.5m
Full-trailer	18.0m

Greatest axle distance	8m or more	9m or more	10m or more	11m or more	12m or more	13m or more	14m or more	15m or more	15.5m or more
Gross weight	25t	26t	27t	29t	30t	32t	33t	35t	36t

●Specified vehicles