DUI Checkpoints, Sobriety Tests and Your Rights

If you drive around Oceanside, especially near Highway 76 or along Oceanside Blvd on a weekend night, you've probably rolled up on a DUI checkpoint at some point. Orange cones, flashing lights, an officer waving cars forward one at a time. Most people's brains go a little blank the second they see one, even if they haven't been drinking. The best thing someone can do is be prepared by understanding ahead of time what is required during these checkpoints, the parameters of sobriety testing in the field, and your rights in both scenarios.

Checkpoints Are Legal, But Not Spontaneous

Sobriety checkpoints are legal in California. The state Supreme Court settled that in 1987 in a case called Ingersoll v. Palmer, and the US Supreme Court backed the general concept a few years later. But legal doesn't mean anything goes. Police can't just set one up wherever, whenever. There are rules that specify approved locations in advance. These checkpoints are not random, last-minute decisions. Officers on the scene must decide on and adhere to a neutral pattern, such as every third vehicle, and the checkpoint must be reasonably visible with proper lighting and warning signs. A lot of departments also give advance public notice, sometimes through local news or a police department's social media post.

When going through a checkpoint, noticing these things ensures that law enforcement is following the rules in place to protect drivers. If a discrepancy can be shown in court, it can become a legal issue if an arrest is made and someone disputes the checkpoint's integrity.

What Is Required and What Is Optional

Once stopped, the non-negotiable is giving the officer your driver's license, vehicle registration, and proof of insurance if asked. However, what is optional for drivers is answering a series of questions about where you were, where you are going, or whether you have had anything to drink or used other substances that could be considered “under the influence”. If you do not want to answer, politely say you do not want to answer. Saying something like "I'd rather not answer that" tends to go over better than silence or an attitude. There is no benefit to being rude and disrespectful to law enforcement while exercising your Fifth Amendment.

Field Sobriety Tests

This is where a lot of confusion comes in. The walk and turn, standing on one leg, following a pen with your eyes- these are called field sobriety tests. In California, sobriety tests in the field are voluntary for most drivers. Drivers over 21 and not currently on DUI probation can decline them. The same applies to handheld breathalyzers, which are used as preliminary alcohol screening tests.

The confusion around these tests is that refusing them somehow is a magical escape from being arrested. Officers can make an arrest if they believe they have enough other evidence- slurred speech, the smell of alcohol, or other things they observed during your stop. Although a refusal might get written into their report, it does not result in immediate license suspension.

There are real consequences to this decision. Following the arrest, California's implied consent law kicks in. This law requires a chemical test, either a breath test or a blood test. Refusing that one is different from refusing the roadside tests and will likely result in a license suspension, along with other penalties, regardless of how the DUI case turns out.