Longitudinal Deceleration Patterns in Interchange Ramps

Interchanges concern a road section widely studied in recent years. The present research focuses on making a number of measurements to draw conclusions about the influence of geometry of ramps (radius, gradient, etc.) on driving behavior and on the correlation between various critical kinematic quantities such as longitudinal deceleration and speed. Also focuses on conclusions about the maximum longitudinal deceleration in interchange ramps of different type and geometric characteristics (with an emphasis on curve radius). In particular, the longitudinal deceleration values before, during and after the vehicles traversal through interchange ramps are recorded and the maximum values are isolated for each driver. These values are correlated with the speed at the corresponding position and with the maximum speed of the tangent preceding the curve, while they are also compared with limit values of literature models or guidelines. Afterwards, characteristic critical values for the maximum longitudinal deceleration are calculated (Gxmax15%,50%,85%), which are related to the radii of the examined curves. From the above values, an empirical characterization diagram of driving behavior is created based on the maximum deceleration and radius values. The results derived from a sufficient number of measurements, led to the conclusion that an increase in speed implies an increase in longitudinal deceleration and indeed with a higher rate for curves of smaller radii. Furthermore, most literature limit values are significantly surpassed, mainly in terms of the smallest radii.

• Record URL:
  • https://annualmeeting.mytrb.org/OnlineProgram/Details/19314
• Supplemental Notes:
  • This paper was sponsored by TRB committee AKD10 Standing Committee on Performance Effects of Geometric Design.
• Corporate Authors:

  Transportation Research Board

  ,    
• Authors:
  • Trakakis, Antonios E
  • Apostoleris, Konstantinos
  • Psarianos, Basil
• Conference:
  • Transportation Research Board 102nd Annual Meeting
  • Location: Washington DC, United States
  • Date: 2023-1-8 to 2023-1-12
• Date: 2023

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Maps; Photos; References; Tables;
• Pagination: 18p

Subject/Index Terms

• TRT Terms: Deceleration; Driving behavior; Highway grades; Interchange ramps; Operating speed; Radius
• Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 01875176
• Record Type: Publication
• Report/Paper Numbers: TRBAM-23-02021
• Files: TRIS, TRB, ATRI
• Created Date: Mar 1 2023 10:09AM