A good rule for developing a safe following distance between you and any vehicle in front is the so-called two-second rule.
As the driver of a vehicle, the obligation is placed on you to drive in such a manner (regardless of speed limit) that allows you to stop your vehicle:
safely, in a controlled way,
on the correct side of the road,
within the distance that you can see to be clear, and
without risk or harm to you, your passengers and/or any other users of the road.
To use the two-second rule, choose a point like a lamp post or road sign. When the vehicle in front passes that point, say out loud "Only a fool breaks the two-second rule". (takse about two seconds to say, if said in a normal manner). Check your position in relation to your chosen point as you finish saying this. If you have already passed the point, you are driving too close to the vehicle in front and need to pull back.
In WET weather your stopping distance increases, so you should double the distance between your vehicle and the one in front of you by saying "Only a fool breaks the two-second rule"twice.
See also related link.
Under normal conditions a safe following distance between your car and a motorcycle should be?
4 seconds
Maintain a safe distance between vehicles. Never tailgate.
8 seconds
What is following distance? Following distance is the space between your vehicle and the vehicle in front of you while driving. It's important for all drivers to maintain a safe following distance, so that they have time to safely stop in case the vehicle in front of them brakes abruptly.
There is no 'safe' distance.
5 seconds
Actually, 2 seconds is NOT a safe following distance. Minimum safe following distance is 5 seconds. Yes, it works at any legal speed in dry weather.
Three seconds
Yes.
3 Seconds
The safe following distance is one car length for each 10 miles per hour. If you are traveling at 40 mph, one should allow a minimum of 4 car lengths between you and the traveling object in front of you. Allow more room for a motorcycle in case they wipe out (fall and crash) in front of you.