Mean lateral vehicle position as a function of display and wind for middle-aged (top) and older drivers (bottom).

<p>(WG = wind gusts present, No WG = no wind gust present. Error bars represent standard errors of the means).</p

A sample display of highway scenarios in a rural environment with the concurrent search task.

<p>A sample display of highway scenarios in a rural environment with the concurrent search task.</p

Intersection scenarios and the corresponding location of target zones.

<p>Intersection scenarios and the corresponding location of target zones.</p

A schematic example of a sign-controlled 4-way intersection with a target zone (area shaded by yellow cone) that contains a latent hazard.

<p>(Prior to the stop sign, drivers should make primary glances side to side. After entering the intersection and before executing a turn, drivers should take secondary glances to the areas defined as the target zones. In this example, drivers should look toward the target zone before making a left turn. The blue car—a latent hazard—was not actually present in the scenario).</p

Mean lateral position variability as a function of search display and wind for middle-aged (top) and older drivers (bottom).

<p>(WG = wind gusts present, No WG = no wind gust present. Error bars represent standard errors of the means).</p

Mean steering input variability as a function of search display and wind for middle-aged (top) and older drivers (bottom).

<p>(WG = wind gusts present, No WG = no wind gust present. Error bars represent standard errors of the means).</p