Every year numerous delays of public transport vehicles (tram or buses) are caused by wrongly parked vehicles blocking the passage. This poses substantial difficulties for the corresponding public transport vehicle, its passengers and above all for schedule adherence of the corresponding transit line. In Vienna alone there are thousands of such service disruptions every year. In order to eliminate the time-consuming towing of the blocking vehicles the detection of potential blockages at the time of parking and a suitable and timely notification of the driver of the blocking vehicle are necessary. The project “TRAM-in-TAKT” evaluates for both tasks suitable technologies as well as the embedding in technical and organisational terms into the operating system of the public transport authorities.