DRIVER EYE HEIGHT AND VEHICLE PERFORMANCE IN RELATION TO CREST SIGHT DISTANCE AND LENGTH OF NO-PASSING ZONES. II. VERTICAL CURVE DESIGN

WHILE THERE IS A DOWNWARD TREND IN THE TOTAL HEIGHT AND RESULTING LEVEL OF DRIVER'S EYE FOR PASSENGER CARS, ITS RESULTS ON THE SIGHT DISTANCE OVER CRESTS DOES NOT APPEAR TO BE SIGNIFICANT ENOUGH TO WARRANT CHANGE IN PRESENTLY USED DESIGN METHODS AND STANDARDS. CURRENT PASSENGER CAR MODELS HAVE DRIVER EYE HEIGHT THAT REDUCES CREST SIGHT DISTANCE BY SOMEWHAT UNDER 5 PERCENT AND THE LIKELY LOWEST FUTURE RANGE MAY REDUCE THE SIGHT DISTANCE UPWARDS OF 10 PERCENT. THESE PERCENTAGES ARE UNIMPORTANT CONSIDERING THE VARIABLES UPON WHICH CURRENT DESIGN FORMULA ARE BASED. /AUTHOR/

Media Info

  • Monograph Title: Relation between vehicle characteristics and highway design
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00220275
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 19 1994 12:00AM