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William Preston Lane Jr. Memorial (Bay) Bridge Automated Lane Closure System Project

The Bay Bridge automated lane closure system (ALCS) is a project constructed for opening and closing lanes including two-way traffic operations on the bridge. Since two-way operations were implemented, lane closures have been done manually. The ALCS will enhance the current manual system for motorists by allowing maintenance crews to remotely implement and discontinue two-way traffic on the Bay Bridge’s Eastern and Western Shores.

The ALCS will include overhead lane-use signals, dynamic message signs, horizontal swing gates, and illuminated pavement markers. These enhancements will be integrated into the existing bridge traffic control system.

Work on the project, such as conduit boring and installation, began in February 2020 on the Eastern Shore and January 2021 on the Western Shore. In Fall 2022, the automated lane closure system will be in place. After the system is live, the MDTA will provide a transitional period with some manual support of the gates system to familiarize motorists to the closure scenarios.

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Automated Lane Closure System (ALCS) Simulation

Bay Bridge Automated Lane Closer System Project Banner

The ALCS will provide a system of communications devices giving motorists early information about the lane closure scenarios on the bridge. The overhead lane use control signals are the regulatory devices that motorists must obey. The signals will transition from green to yellow to red. When the signals are yellow, motorists should vacate the lane, so that no vehicles are present in the lane when the signal is red. The gates will deploy only after the red signal has initiated.

While the ALCS will improve traffic operations by reducing the setup time, the system will not cure the delays that are experienced at the bridge. Even with the new system, delays will persist because fundamentally the volume of the traffic demand exceeds the capacity provided by the number of lanes.

SAFETY BENEFITS

  • Increase safety – reduces crashes
  • Superior incident response
  • Safer work environment for employees

CUSTOMER SAVINGS BENEFITS

  • Less set-up time – reduces congestion associated with manual lane closure operations (cones, signs, arrow panel set-up)
  • Advance notice for incidents – increases safety associated with late lane changing
  • Increases reliability

Contraflow Gate

The above swing gate will replace the current cone and barrel system, allowing remote implementation and discontinuation of two-way traffic while ensuring motorist safety, ease of integration and operational efficiency.

ABOUT CONSTRUCTION

Work on the project, such as conduit boring and installation, began in February 2020 on the Eastern Shore and January 2021 on the Western Shore. In Fall 2022, the automated lane closure system
will be in place. After the system is live, the MDTA will provide a transitional period with some manual support of the gates system to familiarize motorists to the closure scenarios.

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