This research aims to evaluate the effectiveness and limitations of the Road Safety Audit in Thailand. The evaluations would be used as a guideline to set Road Safety Audit policy for transport authorities in order to enhance the traffic safety in the construction area. In the study the construction project route 318 Trat-Had Lek part2 (Section1) Sta.1+900.00 to 20+000.00 (total distance of 18.100 kilometer) was selected as a case study. The accident statistics occurred before the construction and during the construction were compared to analyze the effectiveness of the Road Safety Audit used in the project. The result of the study shows that the main cause of the accident are traffic management traffic sign and marking as well as pavement surface. Therefore the researchers have provided some recommendations against the accident causes. Finally the operations of the contractors according to the recommendations were monthly summarized to measure the effectiveness of the recommendations.

Kansei engineering or effective engineering is an important product development methodology in which users’ or customers’ feelings and demands on the product are translated into important parameters for product design. On the other hand effective engineering is an application of users’ opinion mood and feelings in product design which seems to guarantee that the product will meet the demand of customers. This idea was first developed in early 1970s in Japan. Now it is widely used in both Asian countries such as Japan Korea Taiwan and European countries such as Sweden Spain and France. It is widely used in various fields like applied science and psychological science. This paper discusses the application of Kansei engineering in various daily-used products in both Japanese and Western lifestyles. The perspectives presented in this article are based on the authors’ engineering knowledge.