STUDIES OF THE DESIGN OF EXITS AT GRADE-SEPARATED JUNCTIONS

THEORETICAL STUDIES OF THE POSSIBLE TIME TAKEN FOR A VEHICLE TO LEAVE A TRAFFIC STREAM, OBSERVATIONS AND MEASUREMENTS OF THE USE OF PARALLEL EXIT LANES, CONSIDERATIONS, ON THE CAPACITY OF EXITS, MEASUREMENTS OF THE BEHAVIOR OF VEHICLES LEAVING A TRAFFIC STREAM ON TWO-LANED, WEDGE-SHAPED DIRECT EXITS, CONCLUSIONS DRAWN FROM ACCIDENT STUDIES, AND STUDIES OF THE PERCEPTIBILITY OF EXITS WERE USED TO PROVE THAT IT IS ADVANTAGEOUS TO HAVE PARALLEL EXIT LANES FOR TRAFFIC LEAVING THE MAIN STREAM AT GRADE-SEPARATED JUNCTIONS. THEY IMPROVED THE TRAFFIC FLOW, CAPACITY, PERCEPTIBILITY AND SAFETY OF EXITS. THE RESEARCH RESULTED IN A NUMBER OF RECOMMENDATIONS FOR THE DESIGN OF GRADE-SEPARATED JUNCTIONS; THESE 34 RECOMMENDATIONS RELATE TO THE POSITIONING OF THE EXITS, THE DESIGN OF THE EXIT AREA, THE DESIGN OF ISLANDS, AND THE ALIGNMENT AND CROSS SECTION OF THE EXIT RAMPS. /TRRL/

• Corporate Authors:

  Strassenbau & Strassenverkehr /Germany

  ,    
• Authors:
  • Schnuell, R
• Publication Date: 1970

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 126 p.
• Serial:
  • Issue Number: 107

Subject/Index Terms

• TRT Terms: Grade separations; Interchange ramps; Intersection elements; Intersections; Location; Spacing; Traffic control; Traffic flow; Traffic lanes; Traffic safety
• Old TRIS Terms: Lanes; Parallel routes; Ramp location & spacing
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226848
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: May 24 1974 12:00AM