In a city of 3 to 5 million people there are thousands of taxis (both legal and illegal), meaning there are thousands of taxi drivers going to a million different locations. The sheer volume makes it scary when I hop in a car and the driver knows me and can drive me right to my door without having to be reminded of where I live. All I said was “the number two hospital”(a relatively large landmark a couple of blocks from my house) and the driver looked at me and said “the same place, yeah I remember. I gave you a ride home a few months ago”. And sure enough he did know. It didn’t matter to him if my address was correct or not… he knew right where he was headed.