Commentary on Rasanen and Summala, "Car Drivers' Adjustments to Cyclists at Roundabouts"

This paper presents a commentary on an earlier paper in this journal entitled, "car drivers' adjustments to cyclists at roundabouts." The focus of this commentary is on the visual search process that drivers engage in and how it is guided by top-down factors. However, these top-down factors are largely dependent on visual field objects that fit the driver's expectations. The author explores how these top-down expectancies develop and how they guide search behavior. An outline is presented containing improvements for self-explaining roads that the author posits would enhance the natural behavioral visual field search process, thereby enhancing traffic safety.