VERTICAL CONVEX PARABOLIC TRANSITION CURVES FOR ORDINARY ROADS

SUI RACCORDI VERTICALI CONVESSI AD ARCO DI PARABOLA PER LE STRADE ORDINARIE

The second degree parabola is still the preferred transition curve for linking the various gradients in the vertical alignment of roads. This article presents some easily applied monograms for the rapid determination of minimum curve lengths in terms of the design speed of the road and the variations between the gradients to be joined. The aim of the study is to design curves which provide maximum visibility in terms of braking distances and overtaking manoeuvres, and the nomograms can be applied to single and dual carriageways. /TRRL/

• Corporate Authors:

  Casa Editrice la fiaccola

  Via Carlo Ravizza 62
  Milano,   Italy 
• Authors:
  • CELAURO, B
• Publication Date: 1975-2

Language

• Italian

Media Info

• Features: Figures;
• Pagination: p. 167-175
• Serial:
  • Rivista della Strada
  • Volume: 44
  • Issue Number: 403
  • Publisher: Casa Editrice la fiaccola

Subject/Index Terms

• TRT Terms: Alignment; Design speed; Geometric curves; Highway curves; Highway grades; Parabolas; Passing; Slopes; Stopping distances; Transition curves; Visibility
• Uncontrolled Terms: Vertical alignment; Vertical curvature
• ITRD Terms: 2894: Alignment; 1695: Braking distance; 6486: Chart; 635: Design speed; 2806: Gradient; 1822: Overtaking; 2892: Transition curve; 9087: Vertical; 6783: Visibility; 6793: Visibility distance
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00126206
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 7 1976 12:00AM