Question

What is considered a good following distance when driving at 45 mph?

Answer 1

A three second following distance should be safe, while a four-second distance would apply if you were going 46-70 mph

Answer 2

Step-by-step explanation:

If you are driving below 40 mph, you should leave at least one second for every 10 feet of vehicle length. For a typical tractor-trailer, this results in 4 seconds between you and the leading vehicle. For speeds over 40 mph, you should leave one additional second.