The present invention provides an entry control device, system and method which can recognize a vehicle by its undercarriage image only. The present invention compares a new vehicle undercarriage image with those stored in a reference database to facilitate the automatic search of a vehicle's undercarriage. The present invention can compare the new undercarriage image to the same or similar undercarriage image previously entered in the reference database, highlighting any anomalies such as, for example, foreign objects, explosives, drugs, paraphernalia and other illegal and/or harmful substances and devices.