I recently started using the MTA bus system and have been pleasantly surprised at the general timliness of bus arrivals (at least for the routes I take). I wanted a quick way to see when the next bus was arriving to minimize the time I spent waiting at the stop. I ended up using Google Maps transit directions to repeatedly enter different departure times, wrote the times down on a sticky note, and left it at my desk.
So I guess this site grew out of my desire to replace a sticky note with a list of times on it. Perhaps someone else will find this useful.
Created by Jason Tan.