GENERAL COMMENTS ON SUFFICIENCY-RATINGS PROCEDURES

A SUMMARY IS PRESENTED OF THE PRINCIPLE CHARACTERISTICS OF SUFFICIENCY-RATING PROCEDURES IN USE IN VARIOUS STATES. THE MINNESOTA FORMULA PRESENTED CONSIDERS THREE FACTORS: RELATIVE TRAFFIC CAPACITY, LOAD-CARRY CAPACITY, AND RELATIVE MAINTENANCE COSTS. THE FORMULAS FOR GEORGIA, MISSISSIPPI, AND MONTANA RATE DEFICIENCIES. THE DEFICIENCY-RATING FORMULA SUMS THE DEFICIENCIES OF THE SYSTEM BEING RATED AND MAY OR MAY NOT EXPRESS THE TOTAL DEFICIENCY RATING AS 100- THE SUFFICIENCY RATING. FOUR SECTIONS OF HIGHWAY IN MINNESOTA WERE RATED BY SUFFICIENCY-RATING FORMULAS USED BY 16 STATES. THE DEFICIENCY-RATING FORMULAS SHOW FAR LESS AGREEMENT AS A GROUP THAN DO THE SUFFICIENCY RATING FORMULAS. IT IS CONCLUDED THAT: (1) THERE IS A SIGNIFICANT DIFFERENCE IN THE RATINGS DERIVED BY THE USE OF THE DIFFERENT FORMULAS WHICH MAKES STATE COMPARISONS OF RATINGS OF DOUBTFUL VALIDITY, (2) THE MAJOR DIFFERENCE BETWEEN THE FORMULAS IS IN THE METHOD OF COMPUTING THE CONDITION OF STRUCTURAL ADEQUACY RATING, (3) THE FORMULAS DO NOT PLACE THE ROAD SECTIONS RATED IN THE SAME RELATIVE POSITION WITH RESPECT TO SUFFICIENCY, AND (4) THERE IS CLOSER AGREEMENT BETWEEN THE SUFFICIENCY RATINGS THAN THERE IS BETWEEN THE DEFICIENCY RATINGS.

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  • Supplemental Notes:
    • No 53, pp 7-11, 3 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Swanson, John A
  • Publication Date: 1952

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  • Accession Number: 00200273
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Apr 10 1994 12:00AM