The Fourth Amendment requires police to have a certain amount of proof before pulling someone over or arresting them. Once the officer initiates a traffic stop, the driver and all passengers have been "seized" under the 4th amendment.The Fourth Amendment generally requires government officials to obtain an arrest warrant or search warrant to execute a valid search and seizure. The Fourth Amendment guards against unreasonable searches and seizures during multiple circumstances, including traffic stops. In the discretion of police officers. Unlike a house or apartment, police do not need a search warrant to search you or your motor vehicle. The Supreme Court often insists that Fourth Amendment rules must be objective. 6 When executing a warrant in a home, reasonable force may be used to detain the occupants. 7 The operative word under the Fourth Amendment is reasonableness. In many cases, this amendment governs our interactions with the police.