Safety Evaluation of the Lighting at the Entrance of a Very Long Road Tunnel: A Case Study in Ilam Ahmad Mehri, Roohalah Hajizadeh, Somayeh Farhang Dehghan, Parvin Nassiri, Sayed Mohammad Jafari, Fereshteh Taheri, Seyed Abolfazl Zakerian Safety and Health at Work Volume 8, Issue 2, Pages 151-155 (June 2017) DOI: 10.1016/j.shaw.2016.06.002 Copyright © 2016 Terms and Conditions
Fig. 1 Black hole phenomenon at the entrance to a road tunnel. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 2 Geographical location of the Azadi Tunnel. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 3 Subjective assessment of lighting in entrance tunnels [14]. C, target contrast; SRN, safety rating number. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 4 Measurement of luminance at the entrance of road tunnels. Note. Adapted from the standard IESNA-LM-71-1996. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 5 Determination of the coefficient of friction between road and tire. Note. Adapted from the standard CIE-88-2004. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 6 Sketch of a polar grid. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions
Fig. 7 Placement of a barrier at the entrance of tunnels at specified points. Safety and Health at Work 2017 8, 151-155DOI: (10.1016/j.shaw.2016.06.002) Copyright © 2016 Terms and Conditions