Point location method for a vehicle travelling over a restricted trajectory of known route, the method enabling the point at which the vehicle passes closest to a predetermined position to be detected, and being implemented by a location device which carries out distance and speed measurements of the vehicle along the trajectory, the device comprising at least one geopositioning receiver which receives positioning signals from at least one satellite of a satellite geopositioning system, the device having a local time base which measures the current time, synchronised with respect to the time of the satellite geopositioning system, the method being characterised in that it has: - a step Etp0, during which the speed and position information items of the vehicle over the trajectory thereof, which are provided by the location device, are used in order to estimate, at the current time, the date of passing closest to the predetermined position (T cpa), taking into account the uncertainties on the time base of the location device; - a step Etp1, during which several possible dates for passage of the vehicle closest to the predetermined position are estimated, the possible dates being located around the estimated date of passage closest to the predetermined position (T cpa); - a step Etp2 during which the possible positions of the vehicle on the trajectory for each of the possible dates of passage closest to the predetermined position are estimated, taking into account the uncertainties of speed of the vehicle and position on the trajectory estimated at the current time and extrapolated at the estimated date of passage of the vehicle closest to the predetermined position (T cpa), the possible positions being included in a range of positions centered on the predetermined position; - a step Etp3, during which there is predicted, for each of the possible positions, the shape of a set of satellite geopositioning signals corresponding to the set of geopositioning signals anticipated for this position at the corresponding date; - a step Etp4, during which, for each possible date of passage of the vehicle closest to the predetermined position, the spatial correlation between the geopositioning signals anticipated and those received by the geopositioning receiver at the current time are tested by means of adaptive filtering; the possible estimated position for which the correlation is at a maximum being considered to be the point of passage closest to the predetermined position and the corresponding current time to be the time of passage closest to the determined position. - a step Etp0, during which the speed and position information items of the vehicle over the trajectory thereof, which are provided by the location device, are used in order to estimate, at the current time, the date of passing closest to the predetermined position (T cpa), taking into account the uncertainties on the time base of the location device; - a step Etp1, during which several possible dates for passage of the vehicle closest to the predetermined position are estimated, the possible dates being located around the estimated date of passage closest to the predetermined position (T cpa); - a step Etp2 during which the possible positions of the vehicle on the trajectory for each of the possible dates of passage closest to the predetermined position are estimated, taking into account the uncertainties of speed of the vehicle and position on the trajectory estimated at the current time and extrapolated at the estimated date of passage of the vehicle closest to the predetermined position (T cpa), the possible positions being included in a range of positions centered on the predetermined position; - a step Etp3, during which there is predicted, for each of the possible positions, the shape of a set of satellite geopositioning signals corresponding to the set of geopositioning signals anticipated for this position at the corresponding date; - a step Etp4, during which, for each possible date of passage of the vehicle closest to the predetermined position, the spatial correlation between the geopositioning signals anticipated and those received by the geopositioning receiver at the current time are tested by means of adaptive filtering;