Idaho Code § 49-2703: Driving in procession.

(1) All vehicles comprising a funeral procession shall follow the preceding vehicle in the funeral procession as closely as is practicable and safe.

(2) Any ordinance, law or regulation requiring that motor vehicles be operated to allow sufficient space between them to enable another vehicle to enter and occupy that space without danger shall not be applicable to vehicles in a funeral procession.

(3) The driver of a motor vehicle in a funeral procession may not drive the vehicle at a speed greater than:

(a) Fifty-five (55) miles per hour on a highway where the posted speed limit is fifty-five (55) miles per hour or more; or

(b) Five (5) miles per hour below the posted speed limit on other streets or roads.

(4) A vehicle being operated in a funeral procession must have its headlights and tail lights illuminated. The turn signals must be flashing simultaneously as warning lights on the vehicle which is the first vehicle in a funeral procession and/or which the driver has reason to believe is the last vehicle in the funeral procession.