What Triggers a DUI Stop in South Carolina? 
Before an officer even asks for your license and registration, they are watching your driving behavior. The law enforcement officer may initiate a DUI stop based on specific driving patterns that indicate impairment. These patterns include:
- Swerving: A driver who weaves in and out of lanes without signaling or appears to be losing control may be suspected of driving under the influence. Swerving is often one of the first indicators that law enforcement looks for when deciding to initiate a traffic stop.
- Speeding or Driving Below the Speed Limit: Driving at an unusually slow speed, especially during off-peak hours, may draw attention. On the flip side, speeding and excessive acceleration can signal that the driver is not fully focused.
- Failing to Yield or Stop Properly: If a driver fails to signal their turns or runs a stop sign, it’s not just an infraction—it can raise suspicion that the driver is impaired and unable to properly follow traffic laws.
- Erratic Braking: Sudden or harsh braking without cause can be a red flag. If a driver is having difficulty gauging distance or processing road conditions, it’s another indicator that they might be under the influence.
Physical Signs of Impairment Police Look For
Once an officer has stopped a driver, they’ll begin by observing the individual’s physical condition. There are several visible signs that may prompt an officer to suspect a driver is under the influence of alcohol or drugs. These signs are indicators that law enforcement uses to determine whether additional tests are necessary.- Bloodshot or Watery Eyes: Alcohol and many drugs cause blood vessels in the eyes to dilate, making them appear red or watery. Officers are trained to look for this as a potential sign of impairment.
- Slurred Speech: A common sign of intoxication, slurred speech is a key indicator that officers pay close attention to. If you have difficulty speaking clearly or if your words are slurred, it will likely raise suspicion.
- Strong Odor of Alcohol: One of the first things an officer will notice is the smell of alcohol on your breath. The odor is often a clear sign of intoxication, and in many cases, it can serve as a basis for further investigation.
- Unsteady Walk or Stumbling: When asked to step out of the vehicle, if you appear unsteady on your feet or stumble, officers may reasonably suspect that you are impaired. Balance issues can be a key sign of intoxication.
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Field Sobriety Tests: What to Expect
If an officer suspects that you are under the influence, they may ask you to perform one or more field sobriety tests (FSTs). These tests are designed to assess your coordination, balance, and ability to perform simple tasks. While these tests are voluntary in South Carolina, refusing them can have consequences, such as an automatic license suspension. It’s essential to understand what each test entails.- Horizontal Gaze Nystagmus Test (HGN): This test measures your ability to follow a moving object with your eyes. If your eyes jerk while following the object, it may indicate impairment. This test is used to assess intoxication levels and is a reliable indicator in many DUI cases.
- Walk-and-Turn Test: The officer will ask you to take several steps in a straight line, then turn and return in the same manner. If you struggle to balance or have difficulty following instructions, this is a sign that you might be under the influence.
- One-Leg Stand Test: In this test, you’re asked to stand on one leg for a specified period while keeping your balance. Difficulty performing this task can indicate that you are not in full control of your motor functions.