The following U-turn zone line marking can be installed on roads with ( ) or more lanes in each direction. What is the installation standard in the blank?

Question

The following U-turn zone line marking can be installed on roads with (   ) or more lanes in each direction. What is the installation standard in the blank?

Accepted Answer

③ 3 lanes. The U-turn zone line is installed only on roads with three or more lanes in one direction, at points within a section where U-turns are allowed. [Enforcement Rule of the Road Traffic Act, Appended Table 6, No. 502]