A system and method for imaging underbodies of moving vehicles have a stationary source of radiation to radiate energy upwardly on underbodies of moving vehicles. A stationary video camera adjacent the radiation source on a roadway has an upwardly facing field of view for creating image signals representative of sequential portions of each underbody as each moving vehicle passes overhead. A control station activates the camera and radiation source to create the image signals and creates mosaic signals of all of each underbody from the image signals. A display screen provides a mosaic image of each underbody from its mosaic signals. A virtually real-time inspection or a comparison can be made with previously taken underbody images of the same moving vehicle or with vehicle manufacturers' data for the same vehicular models. Moving cars, trucks, marine vessels, aircraft, can be quickly imaged for inspection and/or comparison by fewer security personnel.