It depends on your city laws. Some cities might have a specific time limit your car can be sitting there on the side of the freeway or any other road, some cities don't have a specific time limit.
You do not need to wait to lt the brakes cool down from city driving, if you are in a race on the other hand everything changes. If your brakes are bright orange when you get out of you car then you should check the oil coolant system.
The power brakes are activated when you start the car. This is normal.
The nouns are :- car hill brakes
Press the brakes or down shift
By puting your feet on the brakes
The system on a car used to slow it down
Friction
"Brakes" make the whole car slow down.
Typically, a knocking noise when to use your brakes in the car is caused by your brakes wearing down. This means you need to get them checked out and repaired.
Assuming you are not pressing down on the gas, when you release the pedal, the car will slow down over time and evetualy come to a stop. Unless you are going down a hill, in which case you will speed up.
depends how long you use them
You wouldn't want to be going down an incline (a hill) and find you have no brakes!