How to set standalone stop line, traffic lights, speedbumps and export it in Apollo XML 5.0 format (.bin)

Dear RoadRunners Team,

I am having a hard time to export my roadrunner scene to Apollo XML 5.0 format (.bin). Currently I have put road, junction,crosswalk and traffic lights only. There are some problem I want to ask for solution:

1. I got a traffic lights on my (.txt) file denoted by "signal", but I don't know why some of the elements are "unknown". I am using the default props for traffic lights (Signal_3Light_Post01) and I setup the ApolloAssetData.xml (I attached below).
2. I want to put stop line to a uncontrolled junction or roundabout. But I cannot see any "stop_line" word in the exported .txt file. I only can see the stop line if I put the traffic sign (signal), and I can see the stop_line inside the signal block.
3. How to add stop sign and yield sign, connect it to a road, and export it to apollo format ?

I think my ApolloAssetData.xml is not correct. I need help from the others. :).

I also attached the exported .txt file for reference

This is my map:

I really need the community to help me. Every answer will be very useful for me.

Thank you