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<p>Turning movements at uncontrolled intersections depend on both longitudinal and lateral vehicular behavior which becomes complex due to lack of understanding of priority rules and weak lane discipline. This study analyzes the acceleration characteristics of right-turning vehicles from minor roads at uncontrolled intersections. Data were collected using a Differential GPS mounted on various vehicle types (2w, 3w, and Car). The analysis categorized maneuvers into approaching, turning, and exiting sections. It was observed that 2&#xa0;W exhibit higher deceleration rates during approach (− 0.18 to − 0.20&#xa0;m/s²) and greater longitudinal acceleration while merging (0.12–0.18&#xa0;m/s²), attributed to their lower weight-to-power ratio. Notably, 2&#xa0;W also experienced the highest lateral acceleration during turns (up to 0.13&#xa0;m/s²), reflecting their dynamic instability. Regression models (0.66–0.83) validated the strong dependence of acceleration on speed, with vehicle type significantly influencing these relationships. Compared to previous studies the findings reveal that two-wheelers (2&#xa0;W) exhibit 20–30% higher lateral acceleration and more aggressive deceleration during approach, while three-wheelers (3&#xa0;W) show lower longitudinal acceleration than reported in literature, reflecting their constrained power-to-weight ratios. Longer ISD enables smoother deceleration, while tighter turns increase lateral forces by 30–35% for 2&#xa0;W. The findings highlight the need for intersection designs that accommodate heterogeneous vehicle behaviors, offering actionable insights for improving safety and traffic flow in uncontrolled intersections.</p>

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Analyzing acceleration characteristics of right-turning vehicles at uncontrolled intersections: a study on longitudinal and lateral dynamics

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Ramesh Babu Kota,
  • Arpan Mehar,
  • K. V. R. Ravi Shankar,
  • Sruthi Sekhar Pallela

摘要

Turning movements at uncontrolled intersections depend on both longitudinal and lateral vehicular behavior which becomes complex due to lack of understanding of priority rules and weak lane discipline. This study analyzes the acceleration characteristics of right-turning vehicles from minor roads at uncontrolled intersections. Data were collected using a Differential GPS mounted on various vehicle types (2w, 3w, and Car). The analysis categorized maneuvers into approaching, turning, and exiting sections. It was observed that 2 W exhibit higher deceleration rates during approach (− 0.18 to − 0.20 m/s²) and greater longitudinal acceleration while merging (0.12–0.18 m/s²), attributed to their lower weight-to-power ratio. Notably, 2 W also experienced the highest lateral acceleration during turns (up to 0.13 m/s²), reflecting their dynamic instability. Regression models (0.66–0.83) validated the strong dependence of acceleration on speed, with vehicle type significantly influencing these relationships. Compared to previous studies the findings reveal that two-wheelers (2 W) exhibit 20–30% higher lateral acceleration and more aggressive deceleration during approach, while three-wheelers (3 W) show lower longitudinal acceleration than reported in literature, reflecting their constrained power-to-weight ratios. Longer ISD enables smoother deceleration, while tighter turns increase lateral forces by 30–35% for 2 W. The findings highlight the need for intersection designs that accommodate heterogeneous vehicle behaviors, offering actionable insights for improving safety and traffic flow in uncontrolled intersections.