What justifies a stop for speeding versus a stop for suspected impairment?

What justifies a stop for speeding versus a stop for suspected impairment?

• A. Both stops require probable cause to continue investigation.
• B. Speeding stop is based on a traffic violation; impairment stop is based on reasonable suspicion of impairment.
• C. Speeding stops require consent; impairment stops require a search warrant.
• D. They are both based on random stops with no evidentiary basis.

Answer: (B)

Stops are justified by the reason an officer uses to pull someone over. Speeding is a traffic violation, so the stop rests on the observed violation itself—the officer can pull the vehicle over to enforce the law. A stop for suspected impairment, however, is based on reasonable suspicion that the driver is impaired; the officer must have a factual basis—such as erratic driving, difficulty following instructions, or odor of alcohol—to briefly detain the driver and investigate. Reasonable suspicion is the threshold for stopping in impairment cases, and only later actions (like arrests or searches) may require stronger evidence such as probable cause. It isn’t about consent or warrants for the initial stop, and it isn’t a random stop with no evidentiary basis. So, the speeding stop is based on a traffic violation, while the impairment stop is based on reasonable suspicion of impairment.

Stops are justified by the reason an officer uses to pull someone over. Speeding is a traffic violation, so the stop rests on the observed violation itself—the officer can pull the vehicle over to enforce the law. A stop for suspected impairment, however, is based on reasonable suspicion that the driver is impaired; the officer must have a factual basis—such as erratic driving, difficulty following instructions, or odor of alcohol—to briefly detain the driver and investigate. Reasonable suspicion is the threshold for stopping in impairment cases, and only later actions (like arrests or searches) may require stronger evidence such as probable cause. It isn’t about consent or warrants for the initial stop, and it isn’t a random stop with no evidentiary basis. So, the speeding stop is based on a traffic violation, while the impairment stop is based on reasonable suspicion of impairment.