VEHICLE TYPE DETERMINATION DEVICE, TOLL COLLECTION FACILITY, VEHICLE TYPE DETERMINATION METHOD, AND PROGRAM

A vehicle type determination apparatus (IA) includes: a plurality of light-projecting units (S1) configured to project light beams; a plurality of light-receiving units (S2) arranged in correspondence with the plurality of light-projecting units (S1) and configured to be capable of receiving the light beams (P); a blocked light region acquisition unit (110) configured to receive input of detection signals indicating whether or not the light beams (P) have been received by the plurality of light-receiving units (S2), and acquire a blocked light region, within a region in which the plurality of light-receiving units (S2) are arranged, that light-receiving units (S2) corresponding to blocked light beams (P) occupy; and a vehicle type determination unit (111) configured to acquire a vehicle body silhouette, which is two-dimensional information obtained by aligning, on a time a.xis, a plurality of blocked light regions acquired at different times, and determine the vehicle type classification to which the vehicle belongs on the basis of the vehicle body silhouette and reference patterns that are categorized by vehicle type classification.