The provision of services in densely built up city areas often requires the solving of a large number of varied problems and in most instances involves the responsible authorities in considerable expenditure. Frequent breaking-up of streets and pavements causes inconvenience to the public and is inevitable if services are supplied by the conventional method under road surfaces. The construction of accessible multi-service tunnels appears to provide a solution to the problem and this paper examines the possibility of constructing tunnels under local conditions. The question of cost has been taken into account but due to the need to deal with the subject in a general manner it has not been possible to include detailed estimates of cost. The conclusions reached indicate that no insoluble problems exist and that accessible multi-service tunnels can provide a sound solution to many of the difficulties which arise from the installation of services in densely built-up areas.
He readily admits that he tends to pile too much on his plate. 'I sometimes think I can take on just one more important thing, and then I find myself stretched for time,' says Johan de Koker, SAICE's president for 2008. Yet, what he perceives as a flaw in his make-up is a quality that is valued and admired by his contemporaries in the engineering profession. To quote colleague George Fanourakis, 'Johan generously devotes significant amounts of his time to matters that advance others, without expecting anything in return. He is one of the most unselfish people that I have ever known.' Lorraine Fourie visited Johan and his wife, Verelene, at their home, where she found him amid what is generally known as orderly clutter