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Tactile Vibrating Toolkit and Driving Simulation Platform for Driving-Related Research

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Published on: December 18, 2020

Could Intelligent Speed Adaptation make overtaking unsafe?

Samantha Jamson¹, Kathryn Chorlton, Oliver Carsten

¹Institute for Transport Studies, University of Leeds, 34 University Road, Leeds LS2 9JT, UK. S.L.Jamson@its.leeds.ac.uk

Accident; Analysis and Prevention

|June 6, 2012

Summary

This summary is machine-generated.

Mandatory Intelligent Speed Assistance (ISA) reduces drivers' willingness to overtake on rural roads, potentially impacting safety. Voluntary ISA had minimal effect, as drivers frequently disengaged it.

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Area of Science:

Road safety research
Human factors in driving
Automotive engineering

Background:

Intelligent Speed Assistance (ISA) systems aim to improve road safety by limiting vehicle speed.
The impact of mandatory versus voluntary ISA on complex driving maneuvers like overtaking is not fully understood.

Purpose of the Study:

To investigate the effects of mandatory and voluntary Intelligent Speed Assistance (ISA) on driver overtaking decisions on rural roads.
To evaluate the frequency and safety of overtaking maneuvers under different ISA conditions.

Main Methods:

A driving simulator study was conducted using rural road scenarios, including 2+1 road sections.
Overtaking scenarios were presented with ISA active and inactive to compare driver behavior.
Overtaking frequency, safety, maneuver quality, and time spent in critical areas were analyzed.

Main Results:

Mandatory ISA significantly reduced the inclination to initiate overtaking, especially on shorter opportunities.
Drivers were more likely to abandon overtakes and spent more time in critical hatched areas with mandatory ISA.
Overtaking maneuver quality decreased, with sharper pull-outs and cut-ins when mandatory ISA was active.
Voluntary ISA showed minimal impact, with drivers disengaging the system in about 70% of scenarios.

Conclusions:

Mandatory ISA may negatively affect overtaking safety on rural roads.
Driver adaptation periods or complementary support functions are needed to mitigate potential risks associated with mandatory ISA.
Voluntary ISA appears to be less intrusive, allowing drivers to manage overtaking decisions more naturally.