Econ101 "Intro to MicroEconomics" Paul Heyne

A question on the Mid-term exam:
What motivations and influences effect motorists on the roadway?

A) They follow their own self-interest to arrive at the destination.
B) They follow an established set of laws.

I don't rememeber what "C" was, but I chose "A". The answer was "B".

I figured that many people don't always follow the law and "cut corners" and manners to get where they're going- sooner.

It is often said that rush-hour urban traffic is inefficient because it is made up predominantly of single passenger vehicles. That is an insupportable claim. Those who drive alone rather than forming a car pool or taking the bus are implicitly showing that they place a higher value on the benefits relative to the costs of driving alone than of any available alternative. For people with the appropriate values, the most efficient way to commute to work could be in solemn procession, carrying candles and chanting psalms.