Further Development of the German Highway Capacity Manual (HBS2011)

The first version of the German Highway Capacity Manual was published in 2001. Now, a new draft is prepared and it will be published in 2011 (HBS2011). For the new German Highway Capacity Manual, the major chapters are revised and some of them are totally rewritten. In this paper, a short overview of the major developments in the new German Highway Capacity Manual is presented. Some new ideas and field dada under consideration are introduced. For example, according to the new measurements, the values of capacity for freeway segments are revised and for the on-, off-ramps, and weaving areas a totally new procedure is developed which considers the traffic flow conditions on the freeways and at on- and off-ramps simultaneously. Also for signalized and unsignalized intersections, the procedures are revised for taking account the new developments in the past 10 years.