Which of the following is NOT a sign of reasonable suspicion that an operator may be under the influence?

Driving at the speed limit is typically not considered a sign of reasonable suspicion that an operator may be under the influence of alcohol or drugs. In fact, driving within the speed limit generally indicates that the driver is adhering to traffic regulations and is likely in control of their vehicle. This behavior does not align with the erratic or unsafe driving patterns often associated with impaired driving.

In contrast, sway in lane, excessive braking, and erroneous signaling are indicative of potential impairment. These behaviors suggest that a driver's ability to operate the vehicle safely may be compromised, prompting a closer investigation. Therefore, the presence of these signs can create reasonable suspicion for law enforcement to determine if an operator is under the influence, while driving at the speed limit does not generate such concerns.