The central station in the city of Rastatt will be reconstructed under the refurbishment program of the Deutsche Bahn for rail stations in the state of Baden-Württemberg. In this context, a reorganization of the adjacent urban space is to be implemented and a section of the Bahnhofstrasse is to be redesigned. Employing engineering guidelines and with help of a microscopic traffic flow simulation model, the technically feasible maximum reduction in the motorized traffic designated space was determined. It was required to attain the maximum possible freed road space for urban design. For this purpose, the minimum necessary number of lanes for sustaining the traffic level of service (LOS) during peak hours have been established and dimensioned along the road and at intersections by means of calculation and microscopic simulation methods. Based on the alternatives determined by the LOS criterion, proposals for the reorganization and design of the road space and for the improvement of the urban space were presented. From a traffic point of view, and in addition to the requirements of individual motorized traffic and public transport, the aspects of bicycle traffic management, pedestrian traffic, crossing facilities, parked cars and the accessibility of industry and retail are taken into account.