301.12 EXPLOSIVES.

   "Explosives" means any chemical compound or mechanical mixture that is intended for the purpose of producing an explosion that contains any oxidizing and combustible units or other ingredients in such proportions, quantities or packing that an ignition by fire, by friction, by concussion, by percussion or by a detonator of any part of the compound or mixture may cause such a sudden generation of highly heated gases that the resultant gaseous pressures are capable of producing destructive effects on contiguous objects, or of destroying life or limb.

   Manufactured articles shall not be held to be explosives when the individual units contain explosives in such limited quantities, of such nature or in such packing, that it is impossible to procure a simultaneous or a destructive explosion of such units, to the injury of life, limb or property by fire, by friction, by concussion, by percussion or by a detonator, such as fixed ammunition for small arms, firecrackers or safety fuse matches. 
(ORC 4511.01(T))

301.13 EXPRESSWAY.

   "Expressway" means a divided arterial highway for through traffic with full or partial control of access with an excess of fifty percent of all crossroads separated in grade. 

(ORC 4511.01(ZZ))

301.14 FLAMMABLE LIQUID.

   "Flammable liquid" means any liquid that has a flash point of seventy degrees Fahrenheit, or less, as determined by a tagliabue or equivalent closed cup test device. 

(ORC 4511.01(U))

301.15 FREEWAY.

   "Freeway" means a divided multi-lane highway for through traffic with all crossroads separated in grade and with full control of access.

(ORC 4511.01(YY))

301.16 GROSS WEIGHT.

   "Gross weight" means the weight of a vehicle plus the weight of any load thereon. 

(ORC 4511.01(V))

301.161 HIGHWAY MAINTENANCE VEHICLE.

   “Highway maintenance vehicle” means a vehicle used in snow and ice removal or road surface maintenance, including a snow plow, traffic line striper, road sweeper, mowing machine, asphalt distributing vehicle, or other such vehicle designed for use in specific highway maintenance activities.  (ORC 4511.01(QQQ))

301.162 HIGHWAY TRAFFIC SIGNAL.

   “Highway traffic signal”means a power-operated traffic control device by which traffic is warned or directed to take some specific action.  “Highway traffic signal” does not include a power-operated sign, steadily illuminated pavement markers, warning light, or steady burning electric lamp.  (ORC 4511.01(MMM))