Lecture 27: Internet-Supported Evaluation of Highway Safety Highway Traffic and Safety Analyses Lecture 27: Internet-Supported Evaluation of Highway Safety Purdue University School of Civil Engineering West Lafayette

Presentation Outline Research Goals Website Design Data Collection Survey Tool Evaluation Evaluation of Safety Information Conclusions

Research Goals Develop a prototype website to obtain motorist feedback about hazardous locations Investigate the relationship between driver perception and highway safety

Website Design

Website Design

Data Collection

Data Collection 146 responses Almost all were complete (non-blank) 95 intersections

Evaluation of Survey Tool User feedback Common complaints Map outdated More options desired

Motorist Concerns

Sources of Motorist Concern

Top Reported Locations

Can Motorists Point Out Hazard? Evidence

Effectiveness of Detecting Hazard

Evaluation of Safety Information Gender and Age Effects No significant difference between male and female respondents Efficiency Rate tends to increase as respondent age increases

Conclusions Much safety information to be gained through the survey Locations indicated by motorists tend to be more hazardous than those not indicated Gender and age of respondents have no significant effects Considering only responses that include first-hand information is justified Motorist feedback is a good supplement to crash data Tarko, A. and B. DeSalle, Perception-base road hazard identification with Internet support, Applied Health Economics and Health Policy, Open Mind Journals, Vol.2, No.4, 2003, pp.191-200.