There’s nothing more New York than standing on a corner and shouting “TAXI” so we need the ability to do this in the game.
Do you mean that you should be able to get them to come to you instead of you going to them? Because you can run up to one and use it, currently.
I like the idea of - if there are no taxis on your street currently - you hit a key on your keyboard and your character does the “whistle” and a taxi spawns just off screen on your side of the road, with the intention to come up to where you are and stop. Of course, traffic may hinder this but you could also run up to that taxi.