Head noun: debris
Postmodifier: on the road

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

Broader concepts

labelprovenanceconfidence
hazardisap:3885780260.520732

Narrower concepts

labelprovenanceconfidence
small stoneisap:1553440390.735662
gravelisap:3944068560.549343
glassisap:1581036860.544200
mudisap:2136530910.474638
nailisap:3002288450.451526
rockisap:3005887230.451074