“You were doing 55 in a 35 mile per hour zone.”
You were driving too fast, and a police officer pulled you over. He explains why he stopped you.
You were doing 55 in a 35 mile per hour zone.
Talk about how fast a person was driving with the phrase "doing (a number)". For example:
He was doing over 100.
You can also add the unit of measurement:
He was doing over 100 miles per hour.
In the U.S., we measure speed in "miles per hour". One mile is equal to about 1.6 km.
An area with a certain speed limit is called a "___ zone". For example, call an area where people are supposed to drive under 55 miles per hour "a 55 mile per hour zone".