The purpose of this study was to evaluate Kentucky's adequacy-rating methods and procedures and to recommend improvements. The rating procedures used by planning engineers in the highway districts were found to be reliable and consistent. Kentucky's methods were found to be superior to methods used in most states, but several changes are recommended. Additions include credits for accident analysis for urban and rural sections, traffic control devices for urban areas, and traffic safety features for bridges. Skid resistance evaluation was changed from a subjective rating to a measured value. Points assigned to the various rating elements have been revised, and adjustment factors have been eliminated. Rate-Quality Control techniques are recommended for identifying hazardous highway sections.

Charts, graphs, and figures used in the rating process have been updated to meet 1976 design standards. Mileposts were located and recorded for all bridges and highway sections. The use of bridge inspectors' data was recommended in place of data obtained from more cursory inspections made by district planning engineers. A procedure to input data from the master file for the computation of bridge ratings was prepared.

Computerization of data handling is recommended to improve efficiency and minimize errors. A computer printout which would include point values of each rating element as well as the final rating of each bridge and highway section is proposed. The printout would include mileposts, reference points, and federal-aid route numbers.

Report Date


Report Number

No. 459

Digital Object Identifier



The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Bureau of Highways. The report does not constitute a standard, specification, or regulation.