motorways road bridges 19 road tunnels 18 roads 16 concrete constructions 12 transport constructions 12 building designing 11 more ... ground communication constructions 10 tunneling works 10 concreting works 9 history 9 real estate development 8 pozemní komunikace 7 road transport 7 drfting 6 iron-concrete constructions 6 civil engineering 5 concretes 4 construction works 4 underground structures 3 reconstruction 3 road communications 3 transport 2 traffic safety 2 geoengineering 2 civil engineering constructions 2 chamber constructions 2 costs 2 drainage 2 supporting walls 2 less ...