Which behavior might indicate impaired driving that CHP officers observe?

The behavior of late braking and erratic driving is a strong indicator of impaired driving because it reflects a lack of cognitive function and motor skills that are essential for safe vehicle operation. Impaired drivers may struggle with judging distances, reacting in a timely manner, or maintaining steady control of the vehicle, which can lead to unexpected braking patterns and swerving. This erratic behavior can be a sign that the driver is unable to process information effectively or make quick decisions, both of which are critical when navigating road conditions and other vehicles.

In comparison, consistent lane changes without signals may indicate reckless or distracted driving but does not necessarily imply impairment. Driving at a constant speed while maintaining a straight course typically suggests that a driver is in control of their vehicle and aware of their surroundings, which contrasts with the signs of impairment displayed in late braking and erratic movements.