at a set of red lights. how many feet should you be behind the vehicle in front of you?
Yes
100 feet
Yes
Use the 2 second rule.
That depends on the speed of the vehicles. As speed goes up, safe following distance goes up.
All emergency vehicles in my area are labelled "Stay 500 feet behind"
Moves magnetic charges in front and behind it.
you should stay close to the hindquarters
300 feet
on what
50 feet