IMPROVED BRIDGE SAFETY INDEX FOR NARROW BRIDGES.
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An improved safety index model is developed for narrow bridges by using data collected on 78 bridges in Texas by the Texas Transportation Institute. The enhanced safety index model consists of the following variables: bridge width, length, average daily traffic, and speed, as well as the subjective safety factors F//6 (grade continuity), F//7 (shoulder reduction), and F//9 (traffic mix). The model was arrived at scientifically by using more objective procedures of classification and by having a stronger correlation with the accident rate than the previous models used by other researchers. It is sensitive to changes or improvements in the constituent factors.
Transportation Research Record
author list (cited authors)
Gandhi, B., Lytton, R. L., & Das, B.
complete list of authors
Gandhi, BVR||Lytton, RL||Das, B