Va. Code Ann. § 58.1-2652
A. The state tax on the rolling stock of a railroad, a freight car company and a certificated motor vehicle carrier, doing business in this Commonwealth shall be at the rate of $1 on each $100 of the assessed value thereof.
Rolling stock of a railroad or a freight car company shall include all locomotives, of whatever motive power, autocars, cars of every kind and description, and all other equipment determined by the Tax Commissioner to constitute rolling stock.
Code 1950, §§ 58-515, 58-530, 58-560, 58-622; 1956, c. 69; 1972, c. 813; 1978, c. 784; 1983, c. 570; 1984, c. 675; 1985, c. 557.