Abstract: To further study the influence of cell phone use by pedestrian crossing street on traffic safety, an RTD model was built for pedestrian using a cell phone when crossing the street from perspectives of both social psychology and behavior psychology, based on SRD theory. The method of comparison before and after the study was adopted to explore the delay rates caused by the various types of cell phone uses were estimated on the basis of data obtained by means of questionnaire and field surveys. The results show that the delay rate caused by man using the cell phone when crossing the street is higher than that by women in the same age range, the delay rate caused by calling or answering the phone is higher than that by the network browsing with cell phone, and the shift from the interface of cell phone to the road condition observation causes a delay of 0.34 s on average.

Key words: pedestrian, strategic response delay (SRD) theory, road traffic delay(RTD), cognitive attitude, phone interface