In AS 11.46.400 - 11.46.495, unless the context requires otherwise,

(1) “highway” has the meaning given in AS 19.59.001;

(2) “motor vehicle” has the meaning given in AS 28.90.990;

(3) “official traffic control device” means a traffic control device that has been placed on a highway by authority of a state or municipal agency, a utility, or a contractor employed by a state or municipal agency or a utility;

(4) “oil or gas pipeline or supporting facility ” means real property or tangible personal property used in the exploration for, production or refining of, or pipeline transportation of oil, gas, or gas liquids, except for property used solely in the retail distribution of oil or gas;

(5) “tamper” means to interfere with something improperly, meddle with it, or make unwarranted alterations to its existing condition;

(6) “traffic control device” includes a sign, signal, road marker, barricade, flare, warning light, reflector, railroad sign or signal, shield, insignia, milepost, or similar device intended to warn, inform, or control the flow of pedestrian, equestrian, bicycle, or motor vehicle traffic;

(7) “utility” means an enterprise, whether publicly or privately owned or operated, which provides gas, electric, steam, water, sewer, or communications service, and any common carrier;

(8) “widely dangerous means” means any difficult-to-confine substance, force, or other means capable of causing widespread damage, including fire, explosion, avalanche, poison, radioactive material, bacteria, collapse of a building, or flood.