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Top Terms > Facilities > Specialized facilities > Underground structures > Tunnels > Tunnels by use > Vehicular tunnels

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Vehicular tunnels (Pdvtrv)

Broader Term
Tunnels by use (Pdvtr)
Narrower Terms
Toll tunnels (Pdvtrvt)
Related Terms (Hierarchical)
Pedestrian tunnels (Pdvtrn)
Pressure tunnels (Pdvtrp)
Railroad tunnels (Pdvtrr)