When I get out of the subway exit closest to my house there are tons of these small sort of cars. What they are, are three wheeled motorcycles (三轮车) with a sort of box in the back where you can sit. They're only 5 kuai and take you to anywhere relatively near. I was exhausted yesterday, so i decided to hop on one and was at home in no time.
my young driver who in this picture is weaving through on-coming traffic
The back door is held by a bungee cord and so it cracks open while you're riding.