About: heavy rail

Premodifier: heavy
Head noun: rail

Same concepts
http://dbpedia.org/resource/Passenger_rail_terminology

Broader concepts

label	provenance	confidence
fix guideway project	isap:6182959	0.640775
transit	isap:1671497	0.279767

Narrower concepts

label	provenance	confidence
subway	isap:495592500	0.382886
metro	isap:203474321	0.369836