Abstract: A measuring vehicle (V) allows the geometric condition of a railway track to be measured in relation to its theoretical configuration. In comprises a rigid chassis (9) making up the measuring base, supported by runners (10, 11,12) and a probing device (13, 14, 15) which takes the bearings of the geometric configuration. The probing device allows the degradation of the geometric configuration found to be determined. The chassis (9) is provided with opto-electronic means (21, 22, 23, 24, N) laid out to measure the elastic degradation of the chassis (9) while travelling on the track (R). The values for deformation of the chassis (9) are passed to the probing device to correct the values of the geometric configuration found.