In certain situations (notably in the event of fire), users will take the decision to evacuate the tunnel. This decision may be spontaneous or may follow evacuation instructions provided by the tunnel operator. More often than not, this evacuation phase will occur before operator personnel or external rescue services have arrived on site.
In addition to signage that helps users to identify emergency exits, two other means of guidance are implemented to help users reach the nearest exit:
This chapter is divided into four pages: