He is in a hurry because he is delivering food. I would think pizza, since most other types of places close well before 2am. His tips are (loosely) based on how quickly he can get the order to the customer and his overall take-home determined by how soon he can be back to the store for more orders.
When it comes to this type of work, you are competing against the other drivers for your paycheck. That is why it is necessary to move quickly. So yes, when I did that type of work I WAS in a hurry and I certainly did speed whenever I thought I could get away with it.
Of course, a general knowledge of your delivery area would help in regards to avoiding cops. So would not shining a light out your window (pulling in the driveway with high beams works well enough for that - eventually he would condition himself to spotting numbers in shittier lighting). Getting a car top that you can plug in to your outlet pretty much guarantees you won't get pulled over unless you are dragging a lynched pope behind you (any serious food delivery business should have their employees use car tops; it boosts sales like you wouldn't believe).
Your 'tip' wasn't very good, either, but this post is too long already.