When a driver detained for citation for a traffic offense fails to produce vehicle registration or personal identification, the officer may conduct a warrantless search of the vehicle where such documentation could reasonably be expected to be found. This includes under the driver’s seat, but excludes the trunk. Where warranted by the facts, e.g., where the driver at some point during the stop, opens the glove compartment immediately above the passenger seat, and later in the stop suggested his wallet may be in the glove compartment, the officer may look in both places.