This report summarises the testing and implementation experience of one State highway administration (Iowa DOT) with three computerised methodologies for prioritising safety improvement projects. The three safety resource allocation models -- incremental benefit-cost analysis, integer programming, and dynamic programming -- were developed by the FHWA and are aimed at maximising total net accident savings under a given budget constraint by selecting the optimal mix of accident locations and the preferred countermeasure alternatives at those locations. The entire model application process, from data collection through interpretation and analysis of model outputs as conducted at Iowa DOT, is described. The State's views toward implementing the models and/or integrating them into its existing highway safety improvement procedures are presented. Major implementation constraints and model limitations as experienced by the State are also identified, along with the required computer and personnel resources for applying the models. The microcomputer version of the resource allocation models and its accompanying input processor program are documented separately in a User's Manual, report number FHWA-IP-88-20.
Samenvatting