(a) The operator of a motor vehicle shall not follow another vehicle more closely than is reasonable and prudent, having due regard for the speed of such vehicle and the traffic upon and the condition of the highway.
(b) The driver of any truck, or motor vehicle drawing another vehicle, when traveling upon a roadway outside a business or residence district shall maintain a sufficient space, whenever conditions permit, between such vehicle and another vehicle ahead so an overtaking motor vehicle may enter and occupy such space without danger. This paragraph does not prevent overtaking and passing nor does it apply to any lane specially designated for use by trucks.
(c) Motor vehicles being driven upon any roadway outside of a business or residence district in a caravan or motorcade, shall maintain a sufficient space between such vehicles so an overtaking vehicle may enter and occupy such space without danger. This paragraph shall not apply to funeral processions.