HRS §291C-50
Keep a safe distance from the car ahead
This law says you must not drive too close to the vehicle in front of you. How close is too close depends on your speed, traffic, and road conditions. Trucks and caravans on highways must leave gaps so other cars can safely pass, except for funeral processions.
The statute, as written — Following too closely
(a) The driver of a vehicle shall not follow another vehicle more closely than is reasonable and prudent, having due regard for the speed of such vehicles and the traffic upon and the condition of the highway. (b) The driver of a motor truck or motor vehicle drawing another vehicle when traveling upon a roadway outside of a business or residence district and which is following another motor truck or motor vehicle drawing another vehicle shall, whenever conditions permit, leave sufficient space so that an overtaking vehicle may enter and occupy such space without danger, except that this shall not prevent a motor truck or motor vehicle drawing another vehicle from overtaking and passing any like vehicle or other vehicle. (c) Motor vehicles being driven upon any roadway outside of a business or residence district in a caravan or motorcade whether or not towing other vehicles shall be so operated as to allow sufficient space between each such vehicle or combination of vehicles so as to enable any other vehicle to enter and occupy such space without danger. This provision shall not apply to funeral processions.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.