When a police officer uses a breathalyzer during a traffic stop and determines that a driver is above the legal limit, many drivers believe that they are out of options to defend themselves against the charges. However, there are a number of methods you can use to fight charges based on breathalyzer results. Sometimes it depends on the nature of the driver's interaction with the officer.
You haven't been drinking, but you know why the officer thinks so when the lights come on. You accidentally swerved over the center line while trying to change the radio station. No other cars are in view, behind or in front of you, so an accident wasn't a real threat. However, you know that's likely to trigger a traffic stop at midnight because it looks like you're drunk.