To resolve freeway incident detection information fusion problems
basic concepts and theory of Dempster-Shafer(D-S) evidence for multi-sensors information fusion is analyzed
and incident detection information fusion D-S method is proposed.Firstly multi-information is compared and incoming fusion information source is determined.Secondly basic probability assignment of incident detection is decided;new information is added continually and believe function is updated.Finally the information fusion result of incident detection is arrived by using the believe function decision method.The information fusion cases from road loop detectors
cellular telephone and probe vehicle show that the information fusion result is better than that of a single information source;the fusion method is correct and effective in freeway incident detection.