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Dr. Lily Elefteriadou quoted in an article related to federal funding in the Gainesville Sun.

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Managed Lane Operations-Adjusted Time of Day Pricing vs. Near Real Time Dynamic Pricing

Contracting Agency: Florida Department of Transportation
Principal Investigator: Yafeng Yin, Ph.D.
Co-Principle Investigator: Lily Elefteriadou, Ph.D.
Co-Principle Investigator: Scott Washburn, Ph.D.
Congestion pricing has been advocated as an efficient way to reduce congestion for over eighty years. However, it has been adopted only recently in part due to the advent of electronic tolling and the pressing need for alternative funding sources to finance transportation projects. In the U.S., a more prevalent form of congestion pricing is high-occupancy/toll (HOT) or express lanes. These are high-occupancy vehicle (HOV) facilities that allow vehicles not meeting the occupancy or other requirements to gain access by paying tolls. Since the first HOT lane was implemented in 1995 on State Route 91 in Orange County, California, the concept has gained traction throughout the U.S., with at least seven HOT lane projects operational. At least three of these projects currently use variable pricing: California Department of Transportation on Interstate 15, Florida Department of Transportation (FDOT) (on Interstate 95), and Minnesota Department of Transportation on Interstate 394.

FDOT plans to deploy a series of connected express lanes on Interstates 95 and 595 in Miami and Fort Lauderdale. Phase 1A of the 95 Express project consists of two northbound express lanes on Interstate 95 from SR 112/I-195 to the Golden Glades Interchange. Phase 1A is operational with the express lanes open to traffic on July 11, 2008 and tolling beginning on December 5, 2008.

There is little research on the overall benefit of dynamic versus time-of-day (TOD) control in these types of systems. Most, if not all, research to date considers hypothetical and idealized situations in which analytical solutions can be derived. This project will help ensure the operational success of and protect the significant investment in these Managed Lanes projects and answer questions such as: 1) does managed lane system demand allocation exhibit hysteresis-like behavior? and 2) do the statistics of urban freeway traffic support dynamic or quasi-dynamic pricing for managed lanes?

The research tasks include: 1) Analyze Managed Lanes Demand Behavior; 2) Analyze TOD versus Dynamic Managed Lane Solutions; 3) Capacity Analysis of 95 Express; 4) Improve Operations for Managed Lanes; 5) Coordination between Pricing and Ramp Signaling and 6) Conduct and Evaluate the Simulation. The project should closely coordinate with the on-going NCHRP Project 03-96, Analysis of Managed Lanes on Freeway Facilities. Duplication of effort will be avoided.


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Transportation Research Center
Lily Elefteriadou, Ph.D., TRC Director
University of Florida Civil & Coastal Engineering
512 Weil Hall | PO Box 116500 | Gainesville, FL 32611-6580
352.392.9537, Ext. 1409
University of Florida
Last Updated 10/7/2013