Signals are informative but slow down responses when drivers meet bicyclists at road junctions


Walker, I., 2005. Signals are informative but slow down responses when drivers meet bicyclists at road junctions. Accident Analysis and Prevention, 37 (6), pp. 1074-1085.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below.


Three experiments used a laboratory analogue to the task of driving to took at drivers' responses to encounters with a bicyclist at a T-junction. In particular, a comparison was made between the bicyclist indicating an upcoming turn with an arm signal, an informal signal of intent, or no signal. Overall, arm signals worked relatively well to inform drivers of the bicyclist's intentions and were easier to perceive than informal signals. It was also found that simple failures to react to the bicyclist in time were more common at shorter thinking times whereas incorrect positive responses were unaffected by thinking time. Most interestingly, these experiments showed that arm signals often slowed down the participants' decision-making processes, leading to a lower probability of their stopping in time when the bicyclist was at risk. Moreover, the same was true for informal signals in which there was eye-contact between the bicyclist and the participant. It is suggested that these effects come about because both arm signals and eye-contact are communicative acts and therefore invoke extra stages of involuntary cognitive processing in the drivers, thereby slowing their reactions. (c) 2005 Published by Elsevier Ltd.


Item Type Articles
CreatorsWalker, I.
DepartmentsFaculty of Humanities & Social Sciences > Psychology
ID Code9435
Additional InformationID number: ISI:000233183200013


Actions (login required)

View Item