system
A chat on subreddit /r/NoStupidQuestions
human
It may take months for vehicle traffic to reduce as people begin to realize the bus is actually on time now which will likely be cheaper and easier than driving if the stop locations work in their favour.
gpt
I think months is optimistic.

People (in aggregate) tend to continue doing what they're doing. If they're used to travelling by car and nothing has changed except that it takes longer, they won't re-evaluate their options they'll just be upset it takes longer.

I think you get more bus riders when people move jobs or houses, or their car breaks down or their insurance goes up a lot... things that can break through the inertia. But those happen infrequently for any particular individual so it won't happen over months.