SPEED VALUES AND PRODUCTION OF LOG HAUL ROADS

THE FACTORS GOVERNING VEHICLE SPEED ON LOG HAUL ROADS WERE OBSERVED. FOR EACH OF THE FOUR TYPES OF LOG TRANSPORT VEHICLE USED, A SET OF TABLES WAS DERIVED. THESE SHOW IN DETAIL THE AVERAGE MAXIMUM SPEEDS FOR A RANGE OF GRADIENTS, CURVES, AND SURFACES. ALSO DERIVED WERE EQUATIONS TO COVER THE ACCELERATION AND DECELERATION OF THE LOG HAUL VEHICLES OBSERVED, UNDER ALL CONDITIONS. A SYNTHESIS OF THESE RESULTS BECOMES A MATHEMATICAL MODEL WHICH SIMULATES A LOG HAUL VEHICLE WHEN CONFRONTED WITH ANY ROAD, THE ROAD BEING DESCRIBED IN TERMS OF GRADIENTS, CURVES, SURFACE AND WIDTH. THUS THE TRAVEL TIME IN MINUTES CAN BE FOUND FOR ANY ROAD, EXISTING OR IN THE DESIGN STAGE. COMPUTER PROGRAMS WERE DEVELOPED FOR THE CONVENIENT MARSHALLING OF THE TABLES AND EQUATIONS, TOGETHER WITH NOMOGRAMS FOR "HAND" USE. AVERAGE STATIONARY TIMES DURING A ROUND TRIP WERE RECORDED; WHEN ADDED TO THE TRAVEL TIME AND THE TOTAL MULTIPLIED BY A SUITABLE UNIT COST, THE TRANSPORTATION COST CAN BE FOUND AND COMPARED WITH THE ESTIMATED ROAD CONSTRUCTION COST. /AUTHOR/

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Filing Info

  • Accession Number: 00203434
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 19 1970 12:00AM