Ciria translation no.27.
Construction Industry Research and Information Association.
Cairns, G. L.
London :  [s.n.], 
[1969]
Three articles taken respectively from: Der Bauingenieur, 1968 43 (3) 77 to 86, 1967 42 (6) 201 to 208, 1966 41 (10) 400 to 409; translation by G. L. Cairns.
1: elevated motorways on steep slopes (hillside bridges), by K. Wenzel and M. Fenz -- 2: the acoustics of road tunnels (abridged), by F. Bruckmayer -- 3: road tunnel ventilation, by K. Herzke.