In this paper, the execution and results of an evacuation experiment that was conducted in a road tunnel in Stockholm in 2014 is presented. The primary objective of the experiment was to evaluate the effectiveness of different emergency exit portal designs, and other technical installations/aids in the tunnel, during a fire evacuation in smoke. Based on the results, it is concluded that the emergency exit portal design, which was developed and evaluated prior to the experiment, seems appropriate for the intended use. However, in order to increase the portal may be complemented with information signs on the wall opposite to the exit, way-finding signs including distances to the closest emergency exits on both tunnel walls, and a loudspeaker installation that can inform evacuating people about the location of the available exits.