Add Left/Right/Turn Round
Function Description: Turn left/turn right/U-turn arrows indicate that the current lane can turn left, right, or turn around. This tool is used to manually click on the point cloud for vectorization of turn left/turn right/U-turn arrows.
Steps
1.Click the Add Left/Right/Turn Round 
button in the Road Surface panel.
- The key points in the arrow icons need to be aligned with the actual point cloud point cloud.
- The red point is the first key point and the green point is the second key point.
2.Left mouse click to select the point cloud key points, the details are as follows, the icon of first key point.
First key point
Second key point
Turn left/turn right/U-turn arrow drawing