Center for Transportation Studies, University of Minnesota
This report is the first phase of a multi-year, ongoing research effort to identify and evaluate the impact of roadway
design elements on driver behavior. The focus of this work is on road tunnels, but similar questions apply in other
The organization of this document reflects the research process employed in this project. First, the background is
established indicating the increasing use of road tunnels to solve many planning problems. The next section identifies
two groups of potential problems related to road tunnel design from the driver's point of view-those related to the
general image of the tunnel, and those related to traffic flow and safety. Then, a case study of the proposed
Stockholm tunnel system illustrates some real design responses to tunnel design problems. Based on these strategies
and actual design approaches, a list of research questions is compiled. Finally, the two-phase research approach for
this project is described. In phase one, computer models are developed and observations are made based on drive
through simulations. In the second phase, subjects will be tested using the driving simulations at the Human Factors
Research Lab to determine how their driving behavior is influenced by design elements.
Design Issues Related to Road Tunnels.
Center for Transportation Studies, University of Minnesota.
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