1. Al-Madani, H.M.N., Abdul-Ghani, A., 1995. Characteristics of drivers understanding of posted signs. Proceedings of the International Forum on Road Research, Bangkok, Thailand. Swedish National Road and Transport Research Institute, Sweden.
2. Al-Madani, H.M.N., Al-Janahi, A.R., Abdul-Ghani, A., 1996. Motorists Conception of Posted Regulatory and Warning Signs, 29th ISATA International Symposium on Automotive Technology and Automation. Florence, Italy.
3. Al-Madani, H.M.H., Al-Sada, I., 1998. Personal and social characteristics of the drivers towards posted signs. University of Bahrain and Swedish Road and Transport Research Institute, Safety on Roads: an International Conference (SORIC’ 98), Bahrain.
4. Road-sign utility as judged by drivers with different amounts of driving experience;Book;Scandinavian Journal of Psychology,1993
5. Hazards associated with three signal words and four colours on warning signs;Chapanis;Ergonomics,1994