HOW YA DOIN?

AN IMPLICATION OF PRESENT SERVICEABILITY INDEXES (PSI'S) IS THAT PAVEMENT CONDITION BE PERIODICALLY INVENTORIED OVER THE ENTIRE LENGTH OF THE HIGHWAY, BOTH TO GATHER EXPERIENTIAL DATA FOR DESIGN PURPOSES AND TO PROJECT MAINTENANCE AND REHABILITATION. HOWEVER, SEASONAL OR ANNUAL SURVEYS COULD NOT BE MADE WITH THE CHLOE PROFILOMETER, WHICH HAD AN OPERATIONAL SPEED OF ONLY 3 MPH. EARLY ATTEMPTS TO OVERCOME THIS PROBLEM RESULTED IN INSTRUMENTS THAT DID NOT SIMULATE THE RIDE EXPERIENCED BY CAR PASSENGER. THIS WORK EVENTUATED IN BROKAW'S ROAD METER, WHICH ASSUMES THAT MOVEMENT FELT BY THE PASSENGER IS A CONSEQUENCE OF MOVEMENT OF THE REAR AXLE AND HENCE THAT MEASUREMENT OF ITS EXCURSIONS PROVIDES AN ADEQUATE MEASURE OF SERVICEABILITY. HOWEVER, RIDABILITY DOES NOT PROVIDE A MEASURE OF STRUCTURAL CAPACITY, I.E., THE ABILITY OF THE PAVEMENT STRUCTURE TO CARRY ITS TRAFFIC WITHOUT FAILURE. TO DATE, THE BENKELMAN BEAM AND THE DYNAFLECT CANNOT BE MOUNTED ON VEHICLES TRAVELLING AT HIGHWAY SPEEDS. IN ANY EVENT, THE IMPLICATIONS OF PSI'S AND STRUCTURAL ADEQUACY FOR MAINTENANCE AND REHABILITATION PROGRAMS ARE FAR FROM OBVIOUS.

Media Info

  • Media Type: Print
  • Pagination: p. 11-16
  • Monograph Title: PAVEMENT EVALUATION USING ROAD METERS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00207529
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: May 21 1973 12:00AM