Fix the map conversion logic for LHT roads

[diegoyabuki]

Checklist

• I've read the contribution guidelines.
• I've searched other issues and no duplicate issues were found.
• I've agreed with the maintainers that I can plan this task.

Description

The current map conversion tool seems to fail converting LHT maps. This task involves identifying the issue in the conversion logic and fixing it.

Purpose

To ensure that LHT roads can be properly converted.

Possible approaches

• Debug the conversion tool when passing a map containing LHT roads as input

Definition of done

• The conversion logic is fixed such that LHT roads can be converted correctly.

[diegoyabuki]

Hello @chishengshih. In the sync meeting this week, we aligned with Darren that he will follow up on this investigation. Does he have a Github account so I can assign this task to him?