On the operation of road tunnels diverse requirements are imposed. This has implications for the design of the areas in front of the tunnel portals, especially in the case of highway tunnel. Designing requires an analysis of the operational phase of the traffic and the use by the maintenance and emergency services. The focus of traffic lines on the middle stripe, providing equipment and vehicles of the maintenance and emergency services for use in the tunnel, the passing of vehicles of events and emergency services in the event of maintenance work, accidents or fire events and turning of vehicles in maintenance and police officers in normal operation.

Extraordinary traffic conditions cause next to the front of tunnel portals already high risk of accidents, an additional danger to road users. The research provides the necessary technical basics in the fields of position and geometry as well as optical guidance and recognition of lanes reconciliation, institutions of passive safety and, in particular, the use and choice of movable guards the central reservation crossing to traffic guidance systems, parking areas for vehicles of maintenance and emergency services, access to infrastructure areas, helicopter landing sites, lighting and fire-fighting items and emergency services.