Method (200, 220), comprising the following steps: - travelling along a section of a road by way of a plurality of first motor vehicles in the same direction of travel; - scanning a right-hand roadside by way of a first sensor, directed laterally to the right, and a left-hand roadside by way of a second sensor, oriented laterally to the left, on each first motor vehicle; - determining right-hand parking spaces on the right-hand roadside on the basis of data from the first sensor and left-hand parking spaces on the left-hand roadside on the basis of data from the second sensor; characterized by the following steps: - transmitting information about the determined parking spaces to a central unit by way of a wireless interface of each first motor vehicle; - receiving the information about the determined parking spaces by way of a wireless interface of the central unit; - determining a confidence value on the basis of a first frequency at which right-hand parking spaces were determined on the section and a second frequency at which left-hand parking spaces were determined on the section, wherein the confidence value expresses the probability of a parking space determined on the left-hand roadside of the road actually corresponding to a parking space that is present, wherein the confidence value is higher the more the first and second frequencies along the road correspond to one another and wherein the confidence value is lower the greater the second frequency consists of measurement noise; and - assigning the confidence value to the section and the direction of travel and providing the confidence value by way of the central unit, - travelling along a section of a road by way of a second motor vehicle in a direction of travel; - scanning a usually distant roadside by way of a laterally directed sensor of the second motor vehicle, wherein the usually distant roadside is the left-hand roadside when right-hand traffic is applicable and the right-hand roadside when left-hand traffic is applicable; - determining a parking space on the basis of the scanning; - the second motor vehicle requesting and receiving a confidence value in relation to the section and the direction of travel from the central unit; and - outputting an indication of the parking space if a confidence value assigned to the section of the road in relation to the same direction of travel exceeds a predetermined threshold value. - travelling along a section of a road by way of a plurality of first motor vehicles in the same direction of travel; - scanning a right-hand roadside by way of a first sensor, directed laterally to the right, and a left-hand roadside by way of a second sensor, oriented laterally to the left, on each first motor vehicle; - determining right-hand parking spaces on the right-hand roadside on the basis of data from the first sensor and left-hand parking spaces on the left-hand roadside on the basis of data from the second sensor; - transmitting information about the determined parking spaces to a central unit by way of a wireless interface of each first motor vehicle; - receiving the information about the determined parking spaces by way of a wireless interface of the central unit; - determining a confidence value on the basis of a first frequency at which right-hand parking spaces were determined on the section and a second frequency at which left-hand parking spaces were determined on the section, wherein the confidence value expresses the probability of a parking space determined on the left-hand roadside of the road actually corresponding to a parking space that is present, wherein the confidence value is higher the more the first and second frequencies along the road correspond to one another and wherein the confidence value is lower the greater the second frequency consists of measurement noise; and - assigning the confidence value to the section and the direction of travel and providing the confidence value by way of the central unit, - travelling along a section of a road by way of a second motor vehicle in a direction of travel; - scanning a usually distant roadside by way of a laterally directed sensor of the second motor vehicle, wherein the usually distant roadside is the left-hand roadside when right-hand traffic is applicable and the right-hand roadside when left-hand traffic is applicable; - determining a parking space on the basis of the scanning; - the second motor vehicle requesting and receiving a confidence value in relation to the section and the direction of travel from the central unit; and - outputting an indication of the parking space if a confidence value assigned to the section of the road in relation to the same direction of travel exceeds a predetermined threshold value.