Guidance-oriented advanced curve speed warning system in a connected vehicle environment | JoVE Visualize

Guidance-oriented advanced curve speed warning system in a connected vehicle environment

¹Center for Transportation Innovation, Department of Civil and Environmental Engineering, Louisville, University of Louisville, KY, 40292, USA.

Accident; Analysis and Prevention|October 31, 2020

View abstract on PubMed

Summary

This study introduces an Advanced Curve Speed Warning (Advanced-CSW) system using connected vehicles technology to improve driver speed compliance on highway curves. The system provides continuous, guided speed messages, significantly reducing speed differences for male drivers.

Area of Science:

Road Safety
Human-Computer Interaction
Transportation Engineering

Background:

Existing highway curve warning systems often fail to ensure driver speed compliance throughout the entire curve.
Drivers may adjust speed before entering a curve but often exceed safe speeds within it.
There is a need for advanced systems that provide continuous guidance during curve navigation.

Purpose of the Study:

To develop and evaluate a guidance-oriented Advanced Curve Speed Warning (Advanced-CSW) system.
To improve driver speed compliance on horizontal curves using real-time, in-vehicle messaging.
To assess the system's effectiveness across various geometric, roadway, and traffic conditions.

Main Methods:

Developed an Advanced-CSW system utilizing Dedicated Short-Range Communication (DSRC) for vehicle-infrastructure (V2I) communication.
Conducted a driving simulator experiment with 30 participants navigating curves under diverse conditions (severity, illumination, wetness).
Evaluated system performance by measuring speed difference (in-curve mean speed vs. advisory speed) and comparing with existing systems (CSW, CSO).

Main Results:

Male drivers showed significantly increased speed compliance with continuous, guided messages compared to one-time warnings or signs.
Female drivers improved compliance using curve signs only, outperforming one-time warnings or continuous guided messages.
Male drivers using Advanced-CSW reduced speed differences by 6.53–7.68 mi/h compared to other systems.

Conclusions:

The Advanced-CSW system effectively enhances driver speed compliance on horizontal curves, particularly for male drivers.
Continuous, adaptive speed guidance throughout the curve navigation is superior to traditional warning methods.
The system offers a promising direction for designing more effective curve warning systems adaptable to real-time conditions.