19 Va. Admin. Code § 30-160-5
The following words and terms when used in this chapter shall have the following meanings, unless the context clearly indicates otherwise:
"Farm tractor" means every motor vehicle designed and used as a farm, agricultural, or horticultural implement for drawing plows, mowing machines, and other farm, agricultural, or horticultural machinery and implements including self-propelled mowers designed and used for mowing lawns.
"Highway" means the entire width between the boundary lines of every way or place open to the use of the public for purposes of vehicular travel in the Commonwealth, including the streets and alleys, and, for law-enforcement purposes, the entire width between the boundary lines of all private roads or private streets that have been specifically designated "highways" by an ordinance adopted by the governing body of the county, city, or town in which such private roads or streets are located.
"Lighting device" means a flashing warning light to indicate both forward and rearward the presence of agricultural equipment that normally travels at a rate of speed below that of other traffic.
19 Va. Admin. Code § 30-160-5
Statutory Authority
§§ 46.2-1005 and 46.2-1102 of the Code of Virginia.