1. Assessment of drivers’ comprehension of traffic signs based on their traffic, personal and social characteristics;Al-Madani;Transportation Research Part F,2002
2. Influence factors of traffic sign comprehension effectiveness in cognitive process;Dai;China Safety Science Journal,2009
3. Du, Z., Pan, X., & Xiao, H. (2008). Traffic sign's safe distance from freeway tunnel's exit. Highway Engineering, 55-58.
4. Use of a driving simulator to evaluate and optimize factors affecting understandability of variable message signs;Dutta;Transportation Research Part F,2004
5. He, C., Li, Z., & Wang, M. (2008). Study on highway tunnel ventilation group and the adjacent tunnel lighting intelligent control and disaster relief linkage. Highway Tunnel, 53-56.