Sun, Feb 26, 2017 | updated 07:10 AM IST

Researchers come up with new theory for safe driving

Updated: Nov 19, 2016 15:31 IST

Washington D.C [USA], Nov. 19 (ANI): Driver inattention is a major factor in traffic crash, but a new theory will help drivers to avoid accidents, say researchers at the Swedish National Road and Transport Research Institute.

In their recent Human Factors paper, "Minimum Required Attention: A Human-Centered Approach to Driver Inattention," Katja Kircher and Christer Ahlstrom looked at the limitations of existing definitions of driver inattention and formulated MiRA, or " minimum required attention."

MiRA considers whether or not the driver - who is only one part of the larger traffic system - is maintaining situation awareness in the driving context; in other words, visually attending to and acting on the minimum amount of information from the environment necessary for safe driving.

It takes into consideration human factors such as drivers' ability to adjust pace and location, balance goals such as efficiency and perceived risk, and use spare capacity (available reaction time) to attend to targets (traffic signals, pedestrians, etc.) that don't pose a risk.

Many of the 50 or so extant definitions of driver distraction suffer from hindsight bias; that is, they identify distraction after the fact. Kircher notes, "with MiRA, the idea is to define the distraction criteria beforehand. Those criteria are based on areas in the driving environment in which certain information has to be sampled [viewed] a minimum number of times for safe operation of the vehicle.

For example, driving on a curvy country road at a certain speed requires a certain minimum frequency of glances ahead to stay on the road. We can then investigate whether or not the drivers fulfill these requirements. In this way, we are able to check their behavior in real time instead of having to wait for a crash."

Kircher and Ahlstrom note that although MiRA is primarily a contribution to the theoretical discussion about driver distraction, it has the potential to be put into operation. With more study, it might be possible to define prototypical driving situations and minimum information-sampling requirements, measure when and how a driver samples information, and, finally, determine whether or not a driver has fulfilled the requirements to optimize safety.

MiRA represents a new perspective on driver inattention and allows "a differentiation between issues related to the traffic system and the driver's responsibility."

As for next steps, Kircher notes, "Our goal now is to apply the theory systematically in our empirical work. Two projects on drivers' and cyclists' attention in an urban environment will provide the first opportunity to do so."(ANI)

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