The invention relates to a system for detecting the crossing of a vehicle, including: a primary set of coils, of rank 1 to N and arranged in a particular layout, a secondary set of coils, of rank 1 to N, arranged in the same particular layout, a primary power supply and measurement device connected to each coil of the primary set so as to supply power to and measure the inductance of each coil, a secondary power supply and measurement device connected to each coil of said secondary set so as to supply power to and measure the inductance of each coil, wherein each secondary power supply and measurement device is synchronized with the primary power supply and measurement device, a storage device for recovering information relating to the number of vehicles detected by each set.