I see what you mean, Google Maps recommends you start at a given time to get to the train it expects you to catch, accounting for walking time. I've only ever s

I see what you mean, Google Maps recommends you start at a given time to get to the train it expects you to catch, accounting for walking time. I've only ever seen the start_time be a couple minutes in the future during regular hours (due to the aforementioned frequency of trains) so it's been very negligible.