100 feet
Use the 2 second rule.
at a set of red lights. how many feet should you be behind the vehicle in front of you?
All emergency vehicles in my area are labelled "Stay 500 feet behind"
you should stay close to the hindquarters
300 feet
Yes
on what
Yes
50 feet
Stay 500 feet behind it if it's lights are flashing (in the U.S.)
to stay behind or to be left