Abstract
This paper examines key freeway capacity parameters for an 18-kilometer segment of a German autobahn that contains a surveillance system and a variable speed limit and congestion level information system using overhead variable message signs located on gantries. This paper includes an analysis of the relationships between vehicle flow, density, and speed surrounding an active bottleneck. The relationships between key traffic flow parameters have been based on reproducible traffic features observed on multiple days. Further, the speed/flow relation for various proportions of heavy vehicles is investigated and results are presented. For the covering abstract see ITRD E134653.