Investigating the Effect of Freeway Congestion Thresholds on Decision-Making Inputs
Record Type: UTC
This project investigates the effect of freeway congestion thresholds on decision-making inputs. Although the congestion problem has been studied for several decades in the United States, there has not been a consensus on when congestion technically begins. Policy discussions about the size of the congestion problem and the need for solutions are often side-tracked by this threshold issue. The proposed research investigates the differences inherent in the threshold choices using detailed freeway data. Specifically, congestion measure values are being examined for different congestion thresholds under a variety of real-world travel time distributions. Freeway segments from different metropolitan areas are being selected to represent the variety of traffic and land use patterns. Travel time distribution patterns for freeway corridors are being analyzed and factors that may affect the travel time distribution are being identified. In the end, the research will help to answer questions such as “Do all congestion measures increase or decline in approximately the same ratio?” and “Are there situations in which one threshold definition would alter investment decisions?”
Start date: 2009/1/1
End date: 2009/12/31
Status: Completed
Contract/Grant Number: DTRT06-G-0044
Secondary Number: 00040
Total Dollars: 40000
Source Organization: University Transportation Center for Mobility
Date Added: 01/21/2009
Index Terms: Traffic congestion, Route choice, Travel time, Decision making, Highway operations, Research projects,
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University Transportation Center for Mobility
http://utcm.tamu.edu
Texas Transportation Institute
Texas A&M University System
3135 TAMU
College Station, TX 77843-3135
USA
Phone: (979) 845-2538
Fax: (979) 845-9761
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Tooley, Melissa S
Phone: (979) 845-8545
Fax: (979) 845-9761
Email: m-tooley@tamu.edu
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