connection between the southern and south-western suburbs with their main roads leading into Berlin. Long distance traffice now no longer had to touch the centre of the city. The only direct main roads from the east were the Heer Strasse and the Olympische Strasse. It was assumed that about 2,500 vehicles per hour could arrive on these two streets, if they travelled at an average speed of 22 miles per hour and seven abreast. This would have meant more than three hours for the arrival of 10,000 cars. Afterwards it was found that the traffic progressed considerably faster. Nevertheless it had proved very useful that the press and radio had asked the public to start some time before the beginning of the events. Otherwise the motorist would have left at an hour suited to normal times, and a bad traffic jam would have arisen at the Reich Sport Field. Hours would have been wasted in untangling this jam. In consequence of such an incident, the arrival of the Fьhrer, of the International Olympic Committee, of the Diplomatic Corps and the members of the Government would have been delayed, so that the entire programme of the Olympic Games would have been disorganized. In order to safeguard the smooth development of the traffic, it was necessary to use the main roads continuously to their highest capacity. The traffic had to be distributed on Heer Strasse and Olympische Strasse so that no gaps could arise. Therefore the police at points distant from the Reich Sport Field had to distribute the cars in the various possible directions. The most important of these points were Knie and Adolf Hitler Square. The latter square was the last crossing where traffic could be divided up, directing the cars either to Heer Strasse or Olympische Strasse. On account of the unsuitability of Adolf Hitler Square for handling the entire stream of traffic, it had been necessary to branch off part of the traffic at Knie, directing the cars over a small detour — Berliner Strasse-Spandauer Chaussee-Reichs Strasse to Olympische Strasse. This meant that from Adolf Hitler Square on, as much of the main traffic as possible had to be directed via Heer Strasse and only the superfluous traffic could be turned into the Reichs Strasse-Olympische Strasse, while the traffic volume still lacking on the Olympische Strasse was obtained from Berliner Strasse via Knie. For this purpose it was necessary to install a telephone connection between the police officers at Adolf Hitler Square and those at Knie, so that they might constantly communicate with each other. In order to safeguard the smooth functioning of the traffic, the main arteries leading to the contest sites within the city had to be kept free from cross traffic. For this purpose, on the days of the main events a motor-traffic boundary was instituted, At certain hours only those cars were allowed to enter the main arteries which could show a ticket for the contests or had important business on these streets. Important business was defined as such business as could not be carried on during other hours. The public was informed hereof through the press and radio. Certain crossings were barred altogether. Only a certain small number of main crossings which were especially suited to traffic regulation could be used. Although the establishment of this boundary resulted in a great deal of additional responsibility and work for the police, it proved to be a very valuable measure. Despite the smaller number of vehicles concerned, the traffic regulation for the regatta sites at Grьnau was equally difficult. Only one main road existed, Adler Gestell, with only one lane. This road was always very much used, even in normal times. The normal traffic was to remain undisturbed if possible, without thereby endangering the smooth functioning of the extra traffic. The traffic from Berlin's western suburbs to Grьnau went via Buckow. It reached Adler Gestell at a point where another part of the traffic had already been branched off to another street. The cars coming from the north of Berlin had to take the road via Friedrichsfelde-Kцpenick-Wendenschloss and finally arrived at the eastern bank of the Dahme. The remaining traffic from Treptow was divided in Niederschцneweide. One branch consisted of the people who had parking tickets for the event. They used the road Kцpenick-Grьnauer Strasse-Regatta Strasse, and arrived at the regatta site