Samenvatting
This report outlines the continuation of the work since the 1983 congress in Sydney on: (1) operation, maintenance, management of road tunnels; (2) pollution- ventilation; (3) lighting (4) traffic (traffic control and management in tunnels- tunnel entrances. The particular case of shipholtunnel (the Netherlands)- traffic data for the ventilation- basis for evaluation of economics of emergency stopping lanes. Accidents and breakdowns in tunnels.