When a trip is shared that route turns green. I have experienced in the past that this can be dangerous. When I was distracted by my thoughts and stressed while driving I accidentally ran a red light, due to the route being green/ok to proceed. It is easy to change to another colour, but on the occasion I mentioned I got lucky.
Something to consider.
I’d like the colour of the route for my shared trips changed. I also like green never to be used to highlight a route whilst I am driving.