You may tailgate:

Question

Tailgating is dangerous and can cause frustration in other drivers on the roadway. A good professional driver maintains a safe following distance of at least four seconds under ideal driving conditions, or six to eight seconds under poor conditions.

Accepted Answer

Under no circumstances.

Answer

If the vehicle in front of you is traveling under the speed limit.

Answer

When traveling under speeds of 35 mph.

Answer

If the vehicle in front of you has a slow-moving emblem.