About the definition of 'offset' in code

[Nancy22-NJ]

Hello Dr. Cheng, I am confused about the meaning of the variable 'offset' in 'xx_basic_info.json' and the codes of executing mutation. Does this represent the offset from a certain point? Thank you for the reply.

[MingfeiCheng]

Hi, the 'offset' is the distance from the start of the lane, along the center line.