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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 includes overhead lane-use control signals, dynamic message signs, horizontal swing gates, and illuminated pavement markers. These enhancements are 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 MDTA began a phased implementation of the Bay Bridge ALCS to familiarize motorists to the new system. This transitional period includes some manual support of the system, with cones and barrels still present. Throughout the course of winter 2022/2023, additional phases of the system will be implemented on the Eastern and Western Shores.

The MDTA reminds those traveling on the Bay Bridge to adhere to overhead lane-use control signals for the safety of traffic operations and motorists.

Overhead Lane-Use Control Signals

  •  RED X - Lane is closed. Do not enter or travel in lane.
  • YELLOW X - Vacate lane. Move to a lane with DOWNWARD GREEN ARROW.
  • DOWNWARD GREEN ARROW - Lane is open.

*Failure to obey overhead lane-use control signals is subject to citation under Transportation Article, Section 21-204.1 – Lane direction control signals: “Where lane direction control signals are placed over the individual lanes of a highway, vehicular traffic may travel in any lane over which a green signal is shown, but may not enter or travel in any lane over which a red signal is shown." 

ALCS Lane Use Signals at the Bay Bridge

Dynamic message sign, overhead lane-use control signals and horizontal swing gates along westbound US 50/301 approaching the Bay Bridge.

 



 

BAY BRIDGE AUTOMATED LANE CLOSURE SYSTEM
(Westbound US 50/301) Driver’s Update

The Bay Bridge Automated Lane Closure System (ALCS) – designed to improve safety and the efficiency of bridge lane closures – is rolling out in phases, starting with westbound US 50/301 approaching the Bay Bridge from the Eastern Shore. Effective Dec. 20, 2022, the ALCS horizontal swing gates, illuminated pavement markers, full-color dynamic message signs (DMS) and overhead lane-use control signals now work in tandem to alert and guide motorists when lanes are opening and closing to accommodate two-way traffic operations on the westbound span. In November 2022, the new larger overhead lane-use control signals and DMS were activated.

  • Stay alert, obey posted speeds and keep moving through the open lanes.
  • Overhead lane-use control signals warn drivers of lane closures starting 1.5 miles before the westbound span.
  • During this transition period barrels still will be used.
  • Additional phases of the system will be implemented on the Eastern and Western Shores throughout the course of Winter 2022/2023.

For 24/7 Bay Bridge traffic information, call 1-877-BAYSPAN (1-877-229-7726) or visit baybridge.com. For real-time updates on major incidents follow us on Twitter at twitter.com/TheMDTA. Sign up for email/ text alerts at https://bit.ly/2Dh9EZn. Find us at facebook.com/TheMDTA.

Illuminated pavement markers.

Automated Lane Closure System (ALCS) Simulation
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Public Calendar

Jul 28

Public Event 7 27

3:01 PM

Point Breeze

Plastic Free July

Plastic Free July is a global movement that encourages individuals and organizations to reduce their reliance on single-use plastics and adopt more sustainable habits. The initiative raises awareness about the environmental impacts of plastic waste and highlights practical ways to reduce consumption, protect natural resources, and support a cleaner future.

Potomac Waterway

At MDOT, Plastic Free July aligns with the department’s commitment to environmental stewardship and sustainability. Small changes in daily habits can collectively make a significant impact, helping to reduce waste and support ongoing steps to create a more sustainable transportation system and workplace.

Employees can support Plastic Free July by reducing their use of single-use plastics, choosing reusable alternatives, and properly recycling materials when possible. From bringing a reusable water bottle to using reusable shopping bags, every action contributes to a healthier environment and a more sustainable future.

Jul 31

PE723

12:00 PM

IT TEST

Public Event - Test


The Nissan was crunched (this is old...)

Aug 06

Capital Committee Meeting

9:00 AM

Livestream

This public meeting is livestreamed and archived on the Capital Committee Meeting Homepage. The Capital Committee Meeting homepage also provides access to the virtual meeting, schedule, agenda, materials and minutes.