The long-term effect of Intelligent Speed Adaptation on driver behaviour

Area of Science:

• Human-Computer Interaction
• Transportation Engineering
• Driver Behaviour Analysis

Background:

• Intelligent Speed Adaptation (ISA) systems provide drivers with real-time speed limit information.
• Understanding long-term driver interaction with ISA is crucial for effective adoption of driver support systems.
• Previous research has explored initial reactions to ISA, but prolonged exposure effects require further investigation.

Purpose of the Study:

• To investigate the impact of prolonged experience with Intelligent Speed Adaptation (ISA) systems on driver behaviour.
• To determine if specific accumulated driving distances correlate with changes in overriding ISA.
• To analyze the influence of driver characteristics and driving environment on ISA interaction.

Main Methods:

• Long-term field trials were conducted in the UK and Sweden.
• Data on driver interaction with ISA systems were collected.
• Analysis focused on participants' overriding behaviour in relation to system exposure, driver characteristics, and driving environment.

Main Results:

• Driver overriding behaviour of the ISA system increased with greater system exposure.
• No generalized turning point (e.g., 3000km, 4000km, 5000km) was identified where overriding behaviour plateaued.
• Driver characteristics and the driving environment significantly influenced the pattern of overriding the ISA system.

Conclusions:

• Prolonged exposure to ISA systems leads to increased driver overriding.
• Driver behaviour with ISA is influenced by individual traits and environmental factors, not just accumulated mileage.
• Findings have implications for the design and implementation of Advanced Driver-Assistance Systems (ADAS).