(Rene Anderson, Joseph Davila, Michael Rowland, 1992)
The objective of this study was to define a method of calculating
freeway and arterial route segment risk levels, and to create a
logical model that will allow for the assessment of the safest route
for a transport to take between any two points (or nodes) within the
Central Business District of Dallas. The significant raw data
available for the segments included in the study was converted into
an additive, aggregate risk level using a series of mathematical
operations. The resulting risk levels served as inputs for a
least-cost (least-risk) network model. A FORTRAN code of Floyd's
algorithm accepted the risk level inputs and provided the optimal
paths between each of the nodes in the network, along with a
cumulative risk level for each path. Both the factor level
calculation process and the network model are flexible enough to be
applied for similar analysis in other cities.