u/falliberda

I found a way to remove the driving line display almost entirely if you creator want.

This issue is a bug that when an edited route is saved, only the data used for the "driving line display" prior to the point where editing began is lost. This does not affect the minimap display or the Drivatar racing line.
A known workaround for this bug is to redraw the route from scratch.

How to remove the Driving Line Display:

1. Place the final checkpoint just before the finish line, complete the route, and save it.
2. Continue editing the route again and redraw the path from that final checkpoint.
3. Save it as overwriting.

However, even using this method, the line may not disappear completely across the entire route. It appears to be a complex issue.

There are likely differing opinions regarding the intentional removal of the driving line display as a workaround for bugs. The driving line display is a feature that players can choose based on their preference, to be honest, I also think it's a tricky solution.
However, I prefer not to provide a broken driving line display in an event, if displaying it correctly proves difficult for some reason, I believe avoiding the bug in this method is an acceptable approach. Furthermore, I think it is also valid to remove it intentionally to create a more realistic driving experience.

I hope this "ambivalent” information proves something useful to the event creators.

Hello, creators. You may have encountered several issues while creating routes or events in Eventlab.
I have summarized the issues I’ve identified and their workarounds below:

1. Even if you set the Race Series to something other than "Road," it saves as "Road." Workaround: None. The race series setting does not apply as intended and does not work with search filters and event poster.
2. There is no function to directly delete local events. Workaround: Create a dummy route, assign it to the local event you want to delete, and save it. Then, delete the dummy route; this will also delete the event that was using it.
3. All local event descriptions disappear after restarting the game. Workaround: Publish all events and edit them via the "Published Events" list.
4. Editing and republishing an event from published events creates a new version in both the local and published lists, leaving the pre-edit version behind. Workaround: If you don't need the pre-edit version, unpublish the published event. Then, delete the local event using the method in item 2.
5. If you don't complete the route layout during the initial save and draw the rest later, the "Driving Line Display" for the initially saved section may disappear (this does not affect the minimap or Drivatars). Workaround: Redraw the route from scratch (re-placing props is not necessary). This issue may occurs with long routes.
6. You cannot select the "Traffic" option in event settings, meaning AI traffic won't appear. Workaround: Traffic cannot be enabled if even a single prop is placed on the route (regardless of whether it is on/off the track or destructible). Remove all props from the route.
7. You cannot update a published event while retaining its Share Code. Workaround: None. Whether the source is local or published, the event is always published as a new event, so the Share Code cannot be carried over.

Good luck!