The report outlines the conditions and results of an evacuation experiments performed on 1-3 July 2014 in the Northern Link road tunnel in Stockholm. The aim was mainly to investigate how people can best be led to an opposite tunnel side during escape in a smoke-filled tunnel. The experiment also aimed to quantify the speed at which people move in smoke-filled tunnel environments (i.e.
at reduced visibility conditions).
Based on the analysis of the results from the experiment it can be concluded that the design of the escape portal, which was used during the experiment, seems to have fulfilled its purpose (getting people to use the emergency exits in smoke-filled tunnel environments). The most obvious result is that some form of guidance is required to get people walking along the right hand side to understand that they should change side at the height of the escape portal. At a minimum, information signs should be installed opposite the escape route to inform escaping persons that they are standing opposite an escape route.
Several of the subjects also indicated that the evacuation signs with information about the distance to the nearest escape route were valuable. This was also stated by several of the people who were not exposed to this type of signs but as a suggestion to get a good evacuation environment. To further increase the likelihood that people evacuating from the Stockholm Bypass it is suggested that evacuation portals also should be equipped with active speakers. Several of the subjects who were exposed to this installation indicated that they benefited from it in finding the exit on the opposite side.
utrymning, vägledande markeringar, vägtunnel
Fridolf, K., & Frantzich, H. (2015). Test av vägledande system i en tunnel. Lund: Lunds universitet.