In-Car Glance-Time Simulator 2D: Assessing Driver…

What is Driver Distraction?

Driver distraction occurs when a driver’s attention is diverted from the primary task of driving, which can lead to accidents. The In-Car Glance-Time Simulator 2D models this phenomenon by simulating eye movements and glances away from the road due to touchscreen interactions.

The simulator uses Fitts's Law, which describes the time taken to rapidly move to a target as a function of the size of the target and the distance to it, to predict how long drivers will need to glance at their screens.

Fitts’s Law in Action

Fitts's Law states that the time required to move to a target is logarithmically related to the ratio of the distance to the target and the size of the target. This relationship helps us understand how different task complexities can affect driver distraction.

By adjusting the sliders for vehicle speed, task complexity (number of taps), and touch target size in the simulator, we can observe how these factors influence the duration of glances away from the road.

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Safety Guidelines and Collision Risk

The National Highway Traffic Safety Administration (NHTSA) provides guidelines for safe driving practices. The simulator checks if the total time spent looking at the screen exceeds NHTSA’s 2-second single-glance or 12-second cumulative-time limits, which are critical to maintaining road safety.

A blind-distance collision test simulates a scenario where the driver is distracted and unable to react in time to avoid hitting a vehicle ahead, highlighting the potential risks of prolonged glances at touchscreens.

Voice-First Interaction and Safety

Voice-first interactions can reduce the need for visual attention on touchscreens. The simulator includes an option to enable voice-first interaction, which can help minimize driver distraction.

By comparing scenarios with and without voice-first interaction, we can assess how different types of interactions impact driving safety.

Frequently asked questions

How does Fitts's Law apply to driver distraction?

Fitts's Law helps predict the time required for a driver to interact with a touchscreen by considering the size and distance of the target. This prediction is crucial for understanding how different tasks can distract drivers.

Why is it important to check against NHTSA guidelines?

NHTSA guidelines provide specific limits on safe driving practices, such as the maximum time a driver should spend looking away from the road. Checking against these guidelines helps ensure that touchscreen interactions do not compromise safety.

What is the blind-distance collision test used for?

The blind-distance collision test simulates a scenario where a driver is distracted and unable to react in time to avoid hitting a vehicle ahead. This test highlights the potential risks of prolonged glances at touchscreens.

How can voice-first interaction improve driving safety?

Voice-first interactions allow drivers to complete tasks without looking at their screens, reducing the risk of distraction and improving overall road safety.

Try it live

Everything above runs in your browser — open In-Car Glance-Time Simulator 2D and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open In-Car Glance-Time Simulator 2D simulation

In-Car Glance-Time Simulator 2D: Assessing Driver Distraction