Currently limited land availability, scarce funds, and social and environmental concerns prevent many agencies from adding new freeway lanes. The combination of these factors is forcing transportation planners and engineers to explore new ways to more effectively operate the existing transportation network. Thanks in part to the enabling capabilities of ITS technologies, the use of managed lanes is one such concept that is being used successfully across the country. The managed lane operational approach can offer peak period free-flow travel to certain user groups, which might be high occupancy vehicles (HOV), trucks, toll-paying vehicles, transit, low-emitting vehicles, or some combination of these and other groups. However, little is known about the complexities of designing a practical, flexible, safe, and efficient facility that may have multiple operating strategies throughout the course of a day, week, year, or beyond.
Based on the research done by TTI, lessons learned have been developed on effectively deploying ITS to provide user information in managed lanes facilities.
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