A track guidance method for a vehicle along a track on a carriageway, wherein the track and the carriageway have different colours, having the chronologically successive method steps: wherein in a first method step, the track and the carriageway are illuminated with a first colour spectrum, wherein the first colour spectrum has the colour of the track, and the intensity of the reflected light dependent on a position transverse to an extension direction of the track is measured, wherein in a second method step, the track and the carriageway are illuminated with a second colour spectrum and the intensity of the reflected light dependent on the position transverse to the extension direction of the track is measured, wherein the second colour spectrum does not have the colour of the track, wherein in a third method step, the difference between the intensity measured in the first method step and the intensity measured in the second method step is calculated as a function of the position transverse to the extension direction of the track, wherein in a fourth method step, the position of the track relative to the vehicle is determined from the difference in the intensities, wherein in a fifth method step, the travel direction of the vehicle is adapted to the extension direction of the track, therefore the vehicle is guided along the track, characterised in that in the first and second method step, the illumination takes place with light polarised in a first polarisation direction, in the first and second method step, the measurement of both light intensities takes place in the first polarisation direction of the reflected light, in the third method step, the difference in the intensities is additionally subjected to an absolute-value generation and in the fourth method step, the maximum, in terms of magnitude, of the difference in the intensities is selected as position of the track relative to the vehicle. wherein the track and the carriageway have different colours, having the chronologically successive method steps: wherein in a first method step, the track and the carriageway are illuminated with a first colour spectrum, wherein the first colour spectrum has the colour of the track, and the intensity of the reflected light dependent on a position transverse to an extension direction of the track is measured, wherein in a second method step, the track and the carriageway are illuminated with a second colour spectrum and the intensity of the reflected light dependent on the position transverse to the extension direction of the track is measured, wherein the second colour spectrum does not have the colour of the track, wherein in a third method step, the difference between the intensity measured in the first method step and the intensity measured in the second method step is calculated as a function of the position transverse to the extension direction of the track, wherein in a fourth method step, the position of the track relative to the vehicle is determined from the difference in the intensities, wherein in a fifth method step, the travel direction of the vehicle is adapted to the extension direction of the track, therefore the vehicle is guided along the track, characterised in that in the first and second method step, the illumination takes place with light polarised in a first polarisation direction, in the first and second method step, the measurement of both light intensities takes place in the first polarisation direction of the reflected light, in the third method step, the difference in the intensities is additionally subjected to an absolute-value generation and in the fourth method step, the maximum, in terms of magnitude, of the difference in the intensities is selected as position of the track relative to the vehicle. wherein in a first method step, the track and the carriageway are illuminated with a first colour spectrum, wherein the first colour spectrum has the colour of the track, and the intensity of the reflected light dependent on a position transverse to an extension direction of the track is measured, wherein in a second method step, the track and the carriageway are illuminated with a second colour spectrum and the intensity of the reflected light dependent on the position transverse to the extension direction of the track is measured, wherein the second colour spectrum does not have the colour of the track, wherein in a third method step, the difference between the intensity measured in the first method step and the intensity measured in the second method step is calculated as a function of the position transverse to the extension direction of the track, wherein in a fourth method step, the position of the track relative to the vehicle is determined from the difference in the intensities, wherein in a fifth method step, the travel direction of the vehicle is adapted to the extension direction of the track, therefore the vehicle is guided along the track, characterised in that in the first and second method step, the illumination takes place with light polarised in a first polarisation direction, in the first and second method step, the measurement of both light intensities takes place in the first polarisation direction of the reflected light, in the third method step, the difference in the intensities is additionally subjected to an absolute-value generation and in the fourth method step, the maximum, in terms of magnitude, of the difference in the intensities is selected as position of the track relative to the vehicle.