Colorado Sobriety Checkpoints

Here’s what a DUI lawyer has to say about checkpoints

Posted Michelle Jones May. 16, 2014 @ 11:00 am

Colorado law enforcement officers frequently set up DUI roadblocks, called “sobriety checkpoints,” to evaluate passing motorists for signs that they are under the influence of alcohol or drugs. The purpose of these roadblocks is to detect DUI drivers that might otherwise escape the attention of the police. As the police stop the passing vehicles, they attempt to detect whether a driver’s speech is slurred, whether they can smell alcohol or drugs, and whether the driver’s demeanor seems to be impaired in any way. If the driver shows any indication of impairment, he or she will be asked to exit the vehicle to perform field sobriety tests and blood testing. If you have such a case, your Colorado DUI lawyer will have to analyze the procedures used by law enforcement in conducting the roadblock. It is illegal for the police to stop your vehicle unless they closely follow the procedures required by law for such a roadblock.

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The rules are intended to make the process indiscriminate – meaning that all cars have to be treated equally. This usually takes the form of stopping every driver, every third driver, or every fifth driver — and so on. The roadblock is considered “Constitutional,” or legal, as long as the police stop the vehicles according to a prescribed plan, and not based on other considerations, like what kind of car a person is driving.


The plan for Colorado sobriety checkpoints that the police follow during the roadblock is required to be established and approved before the roadblock begins. If the police change the procedure they are following while the roadblock is underway, they must record their reasons for the change and the new plan must also be legal.

The law enforcement agency conducting the roadblock must provide motorists with an alternative route to the roadblock itself. In other words, it is improper to conduct Colorado sobriety checkpoints in a location where there is no alternative route, and drivers are trapped into going through the police roadblock. If you find an alternative route, you are legally allowed to take it without any penalty. Avoiding a checkpoint location does not produce reasonable suspicion or probable cause for the police to pull you over.


The National Highway Traffic Safety Administration has established guidelines for establishing the location of these checkpoints. When choosing the location of Colorado sobriety checkpoints , the law enforcement agency should consider locations that have a historically high rate of DUI-related accidents and arrests. The safety of the location is also important, and a location should be selected based on the police department’s ability to safely administer the checkpoint. A site is more likely to be chosen if traffic back-ups can be avoided. Therefore, areas where there are frequent traffic jams are less likely to be chosen, as are areas that cannot handle traffic back-ups. Generally, checkpoints will be operated during times when there are expected to be a higher number of drivers that are impaired by alcohol or drugs.


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When conducting Colorado sobriety checkpoints, the police must stop vehicles in a non-discriminatory way. This means that they can stop and investigate the sobriety of drivers in every car, or every other car, or every third car, etc. The police cannot just decide on a car-by-car basis whether to stop the driver, as this is legally impermissible. The operating procedure should be outlined in writing before the checkpoint is initiated. The officers conducting the stop should be uniformed and easily identifiable as law enforcement authorities.

When a driver is stopped at a Colorado sobriety checkpoint  police will be looking for:

  • The odor of alcohol or drugs
  • Bloodshot eyes
  • Alcohol containers
  • Drug paraphernalia
  • Fumbling fingers
  • Slurred speech
  • Admission that you have been drinking or using drugs

CDOT also recommends that the officers involved in the sobriety checkpoints operation be specifically trained in DUI detection, in addition to being trained to use the Standardized Field Sobriety Tests established by the National Highway Traffic Safety Administration.

Your DUI lawyer will examine the roadblock procedures used by the police, the officer’s history of impairment detection training, as well as the officer’s allegations of probable cause that led him to ask you to exit the car. Challenging the admissibility of this evidence on Constitutional grounds is crucial. The evidence against you can only be considered if it was obtained legally and fairly.


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