CASE STUDY IN SENSITIVITY OF HIGHWAY ECONOMY FACTORS

EXPECTED INCREASES IN SHIRLEY HIGHWAY TRAFFIC CROSSING THE POTOMAC RIVER HAVE LEAD TO AN ECONOMIC STUDY OF THREE RIVER CROSSING PROPOSALS. THESE INCLUDE A REVERSIBLE EXPRESS LANE BRIDGE, THE WIDENING OF TWO EXISTING STRUCTURES TO MAKE SIX LANE BRIDGE AND A NEW FOUR LANE BRIDGE IN A REMOVED LOCATION. THE STUDY REFLECTS THE ADVANTAGES OF BUILDING ADDITIONAL CAPACITY FOR THE PEAK HOUR, AS WELL AS MAINTAINING THE NULL CONDITION FOR OFF-PEAK BY CONSIDERING THE DAILY TRAFFIC UNDER THREE OPERATING CONDITIONS. CONSIDERABLE EMPHASIS WAS PLACED ON AN ANALYSIS TESTING THE SENSITIVITY OF THREE VARIABLES INCLUDING THE MINIMUM RATE OF RETURN /VESTCHARGE RATES/, THE VALUE OF TIME AND THE PROBABLE VALUE OF TRAFFIC VOLUMES. BOTH BENEFIT-COST ANALYSIS AND RATE-OF-RETURN SOLUTIONS ILLUSTRATING THE SENSITIVITY OF VARYING COMBINATIONS OF FACTORS ARE PRESENTED GRAPHICALLY. OPTIMAL DECISION MAPS WERE PLOTTED, WITH CONSIDERATION GIVEN TO VARYING RATES OF TRAFFIC GROWTH, TO PROVIDE DEPTH TO THE COST ANALYSIS.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 2-19
  • Monograph Title: Engineering economy
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00201124
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Oct 20 1994 12:00AM