spur track(n = noun.artifact) branch line, spur - a railway line connected to a trunk line;
is a kind of line, rail line, railway line
has particulars: loop-line

cart track, caterpillar track, cinder track, data track, dirt track, fast track, half track, inside track, laugh track, off the beaten track, on the spur of the moment, railroad track, sound track, spur, spur blight, spur gear, spur wheel, streetcar track, track, track and field, track down, track event, track meet, track record, track star