ted in section 4.5. One of the interesting directions for further research is a detailed investigation on the relation between desired and actual speed in an area with smoke. It can be achieved by other experiments as well as a cross analysis of results from previous experiments \[[@pone.0201732.ref008], [@pone.0201732.ref009], [@pone.0201732.ref012], [@pone.0201732.ref023], [@pone.0201732.ref025]\].

In the current research the influence of obstacles like other cars was out of the scope (for research objectives see sec. 1). The presence of other vehicles, especially in smoke conditions would affect the evacuation process \[[@pone.0201732.ref011]\]. We notice that, as future work, more experiments with obstacles such as stopped cars should be carried out.

Further work are also required to fully understand the decision making process made by evacuees during a tunnel fire, both in case of decision on evacuation start and path selection.

Supporting information {#sec016}
======================

###### Detailed information about an experiment.

Tunnel architecture, detailed data of participants and the exact evacuation instructions given to participants after experiment 1.

(TEX)

###### 

Click here for additional data file.

###### Survey for participants original version in Polish.

(PDF)

###### 

Click here for additional data file.

###### Survey for participants translated to English.

(PDF)

###### 

Click here for additional data file.

###### Evacuation times at chechpoints.

(XLSX)

###### 

Click here for additional data file.

###### Infrared camera record from experiment 2.

(MP4)

###### 

Click here for additional data file.

###### Infrared camera record from experiment 3.

(MP4)

###### 

Click here for additional data file.

###### Infrared camera record from experiment 4.

(MP4)

###### 

Click here for additional data file.

The work was supported by grants no 11.11.120.859 and 15.11.100.078 from AGH University of Science and Technology. There was no additional external funding received for this