What are some common signs of impaired driving?

Swerving and abrupt stopping are clear indicators of impaired driving because they demonstrate a loss of control over the vehicle. When a driver is under the influence of alcohol or drugs, their ability to react quickly and maintain a steady trajectory is compromised. Swerving can signify that the driver is struggling to stay within their lane or is unable to respond appropriately to traffic conditions. Abrupt stopping might indicate that the driver is having difficulty judging distances or reacting to road signs and signals, both of which are critical for safe driving.

In contrast to this, behaviors like speeding and tailgating, while also unsafe and potentially indicative of aggressive driving, are not as directly linked to impairment as swerving and sudden stops. Similarly, driving in the slow lane or using turn signals frequently are generally associated with cautious driving behavior and do not inherently signal impairment.