(1) Riding single file on the usable shoulder is encouraged.

(2) Care and caution as well as compliance with rules of the road and traffic control devices - signs, signals and markings shall be exercised by bicycle operators when traveling upon state highways.

(3) No person operating a bicycle shall stop on a bridge or other structure, except on a sidewalk or other area not less than three feet wide separated from the traveled roadway by a painted stripe or a physical barrier.

(4) When traveling in a large group, caravan or expedition, the size of travel units shall be limited to a maximum of six bicyclists per unit.

(5) The maximum number of units in a group, caravan or expedition shall not exceed twenty-five.

(6) Travel units of bicyclists shall maintain a minimum spacing between travel units of 500 feet to provide passing opportunities for motor vehicle operators.