This invention is of interest in the field of {HEAD ~ the guidance} of {TAIL ~ public transport road vehicles} by a rail 
of
This invention is of interest in the field of { HEAD ~ the guidance } of { TAIL ~ public transport road vehicles } by a rail
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH