Calculation of travel time savings by dual mode route guidance for the South corridor in the Stuttgart test field

The dual mode route guidance system (DMRG), as a combination of the autonomous route guidance system and infrastructure supported dynamic guidance system, is tested with respect to functionality and feasibility in Stuttgart, Germany. For the calculation of the travel time savings in order to assess the system, the Southern corridor of Stuttgart is investigated. The approach images all relevant traffic issues and discriminates groups of drivers in dependence of familiarity with the area and equipment rate. The calculation was carried out with a macroscopic assignment model. On an inbound two-lane carriageway, an incident was simulated which affected the complete flow bundle passing the erected bottleneck. Depending on the equipment rate, 20-50% travel time savings were achieved. Similar calculations were carried out for a big evening event in a downtown stadium and "Octoberfest" area attracting 10,000 additional vehicles which resulted in a travel time increase quantified in dependence of the equipment rate.