Every truck, bus, or truck-tractor, over 10,000 pounds manufactured gross vehicle weight, when driven outside of the lighted area of towns and cities shall be equipped with 3 bidirectional reflective warning devices approved by the director and in compliance with title 49 CFR part 393.95(F) of the motor carrier safety regulations. These warning devices shall be utilized as follows, except when stopping momentarily under conditions described in RSA 265:112:
I. On divided highways and one-way roads a warning device shall be placed within 10 feet of the rear of the vehicle, one warning device shall be placed 100 feet and one warning device 200 feet in the direction of on-coming traffic on the traffic side of vehicle.
II. On all other ways one warning device shall be placed 10 feet on the front or rear of the vehicle on the traffic side, one warning device shall be placed 100 feet to the rear and one warning device 100 feet to the front of the vehicle on the traffic side.