Which driving behavior could be indicative of impaired driving?

Exceeding the speed limit consistently can indicate impaired driving behavior. When a driver is under the influence of drugs or alcohol, their judgment, coordination, and reaction times can be significantly affected. This impairment may lead to a lack of awareness about safe driving speeds, causing the driver to exceed the speed limit without realizing the danger or violation.

In general, drivers who are sober tend to obey traffic laws, including speed limits, as they have a clear sense of situational awareness. In contrast, impaired drivers may engage in reckless behavior such as speeding because their ability to assess risk is compromised. This can increase the likelihood of accidents and endanger not only themselves but also other road users.

The other options, while demonstrating certain unsafe behaviors, do not as clearly indicate impairment as consistently exceeding the speed limit does. For example, driving with the headlights off may suggest a lack of awareness but doesn't specifically point to impairment from substances. Stopping at all traffic signals and maintaining a steady lane position, on the other hand, could indicate cautious driving or adherence to traffic laws, which is generally not representative of impaired driving.