HORIZONTAL TRANSITION CURVES BY MEANS OF THE BIQUADRATIC PARABOLA

RACCORDI PLANIMETRICI DI FLESSO MEDIANTE PARABOLA BIQUADRATICA

The authors propose the adoption of a fourth degree equation referred to as the biquadratic parabola, to resolve the problem of transition between discordant horizontal curves. The numerical procedure is explained and a nomogram is presented to facilitate the selection and calculation of these curves and to check the validity of preselected curves. The method is suggested as an alternative to the traditional clothoid curves. /TRRL/

• Corporate Authors:

  Casa Editrice la fiaccola

  Via Carlo Ravizza 62
  Milano,   Italy 
• Authors:
  • Dasta, E
  • Festa, E
• Publication Date: 1978-4

Language

• Italian

Media Info

• Features: Figures; Tables;
• Pagination: p. 369-383
• Serial:
  • Rivista della Strada
  • Volume: 47
  • Issue Number: 441
  • Publisher: Casa Editrice la fiaccola

Subject/Index Terms

• TRT Terms: Charts; Curvature; Curves (Geometry); Highway curves; Linings; Mathematical models; Parabolas; Transition curves
• Uncontrolled Terms: Horizontal curvature
• Old TRIS Terms: Rigid linings
• ITRD Terms: 2872: Bend (road); 6486: Chart; 2870: Degree of curvature; 6473: Mathematical model; 2892: Transition curve
• Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00184345
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jan 13 1979 12:00AM