"Trolley vehicle" means a vehicle the motive power for which is supplied by means of a trolley line and which may or may not be confined in its operation to a certain portion of the roadway in order to maintain trolley line contact.
RCW 46.04.640
Trolley vehicle.
1961 c 12 s 46.04.640
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.