Traffic and Safety

Network-wide impact of freeway bottleneck improvements

Freeway networks in urban areas contain a number of bottlenecks (merge, diverge, weave, curve, etc.) where congestion often occurs. The performance of these bottlenecks may be improved by a number of traffic management strategies such as ramp-metering, variable speed limits, capacity expansion, etc. However, traffic operations at these bottlenecks may not be isolated: an improvement of one bottleneck may impact the performance of other bottlenecks and hence the network wide performance. The objective of this study is to develop a systematic method to determine the interdependence of freeway bottlenecks, such that bottleneck improvements can be determined strategically and systematically.

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Idea Submitted by : Soyoung (Sue) Ahn

Idea Champion - Who at MnDOT/LRRB? : TBD

Why is this a priority and what are the benefits for the State/County/City? :

This research will help an agency to better assess the operational benefits of freeway traffic management strategies, considering the interactions between bottlenecks and their network-wide impact. Therefore, this research will help an agency develop plans to improve freeway operations more strategically and holistically.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Idea No. 133