Deformable speed hump
Degradable erosion control barrier
Delivery and retrieval device for road cones
Depressible pavement marker
Depressible reflector road stud
Design and construction of hulls
Detachable barrier
Detachable lifting mechanism for a tracked snow vehicle...
Detachable mounting for rate control slide in fertilizer...
Device and method for monitoring the state of the...
Device and method for repair of pot holes
Device and method for sign illumination
Device and method of optical signaling for road or traffic...
Device and process for fastening rails on sleepers
Device and process for inserting elements in the ground,...
Device at cassettes for spring members in a rotor for e.g. a...
Device at road roller
Device for absorbing impact energy
Device for absorbing vibration of rail
Device for adjusting a track structure and switches