SURVEY OF DOWNHILL SPEEDS OF TRUCKS ON MOUNTAIN GRADES

A STUDY WAS MADE OF THE DOWNHILL OPERATIONAL SPEEDS OF HEAVILY LOADED TRUCKS ON MOUNTAIN GRADES ON THE HIGHWAYS IN ARIZONA DURING 1949 AND 1950. THE OBJECT OF THE SURVEY WAS TO PROVIDE BASIC DATA TO DETERMINE JUST HOW FAST A HEAVY TRUCK TRAVELED DOWN VARIOUS RATES OF GRADES AND WHAT PECULIAR TRAVEL HABITS WERE ASSOCIATED WITH THESE COMMERCIAL VEHICLES. PRELIMINARY STUDY DISCLOSES THAT TRUCKS NEED LITTLE SPECIFIC CONSIDERATION ON DOWNGRADES AND GENERALLY ASSUME SPEED CHARACTERISTICS COMMONLY ASSOCIATED WITH PASSENGER VEHICLES. SEVEN TYPICAL FIELD LOCATIONS ON TRANSCONTINENTAL ROUTES WERE ANALYZED WITH MOUNTAIN GRADES RANGING FROM +2 TO OVER +6 PERCENT. ELEVATIONS VARIED FROM SEA LEVEL TO 7200 FT. WHILE TRAFFIC VARIED FROM 1000 TO 3000 VEHICLES PER DAY. /AUTHOR/

  • Supplemental Notes:
    • Vol 30, pp 322-329, 5 FIG, REF
  • Authors:
    • Willey, W E
  • Publication Date: 1951

Media Info

  • Monograph Title: Proceedings of the Thirtieth Annual Meeting of the Highway Research Board Held at Washington, D.C., January 9-12, 1951
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00223509
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 25 1971 12:00AM