They're just impatient and in a hurry and nothing is more important than that. So they swerve here, turn there, get between those two cars, accelarate some, get past that red light, do a few more amazing maneuvers and finally get to the desired location. Again, for those of you who are driving here, do wear seat belts, avoid dark areas, and all that other big city advice. But it's the law of the jungle, and one has to survive. And another thing is to watch out, because signs and signals aren't as clear as they should be and that can give you a bit of trouble if you are in a hurry to get somewhere.
Bus drivers are the worst.
If a normal person is in a hurry to get there at all costs, then the bus driver is desperate to get to that nowhere place he is going to. They drive across 3 lanes of traffic, pick up a person or two and back in they go. They thus slow down traffic and cause a tremendous amount of accidents. I've almost broken my ankle wearing heels while standing in a surfer pose on the bus so as not to fall each time the driver braked. They practically never stop downtown when they should, so pedestrians should be on the lookout at all times.