Often, when someone is stopped for DUI/DWI, the motorist will be unsure why they were stopped. The police officer will claim that he saw the vehicle weave and will claim that this traffic infraction provided a basis for the stop.

Under the Fourth Amendment to the United States Constitution, a police officer must possess what the law calls reasonable suspicion that a driver is committing a violation of the traffic laws to make a motor vehicle stop. A common reason for motor vehicle stops in DUI/DWI cases, driving under the influence, is weaving or a lane roadway violation.

Under Rhode Island General Laws