The demand-oriented road improvement may cause inconsistency between roads of same type in terms of traffic channelization and control, and thus may reduce self-explainability of the roads. In this study, situation awareness is employed as theoretical foundation to evaluate the self-explainability of demand-oriented road improvement. Ten drivers were recruited to conduct a naturalistic study and performed a verbal commentary while driving on two roads of same type in Beijing. The one, which kept the initial design, acted as a control condition. Another one, which was channelized and controlled according to traffic demand, acted as the experimental condition. Then the drivers’ situation awareness was modeled using semantic networks. The content and structure analysis of these networks were analyzed. The results show that the former road is richer in situation awareness and has a higher self-explainability. The findings suggest that the demand-oriented road improvement is not beneficial to road safety due to poor self-explainability.
The Self-Explainability of Demand-Oriented Road Improvement
International Conference on Transportation and Development 2018 ; 2018 ; Pittsburgh, Pennsylvania
2018-07-12
Conference paper
Electronic Resource
English