MassDOT unveils twin arch bridge design for Bourne and Sagamore Bridges project

In a recent meeting of the Cape Cod Metropolitan Planning Organization, officials gathered to discuss significant advancements in the canal bridges program, a project poised to reshape the region's transportation landscape. As the meeting unfolded, attendees were reminded that the initiative extends beyond mere bridge replacements; it encompasses a comprehensive enhancement of the entire transportation system in the area.

January marked the fourth round of public meetings dedicated to this ambitious project, where community feedback has played a pivotal role in shaping the design. The preferred bridge type, identified as a twin arch style, emerged from public outreach efforts that allowed residents to express their preferences. This design not only promises efficient construction but also aims to maintain the aesthetic continuity with existing structures.

Key features of the proposed bridges include two travel lanes in each direction, along with entrance and exit lanes to facilitate safe merging from nearby roadways. The design also incorporates shoulders—10 feet on the right and 4 feet on the left—to meet current standards and ease maintenance activities, addressing a significant challenge posed by the existing structures.

A notable addition to the project is a shared-use path cantilevered off one of the bridge structures, ensuring a safe passage for cyclists and pedestrians. This feature highlights the project's commitment to integrating multimodal transportation options, with future discussions planned to connect these paths to surrounding infrastructure.

The meeting also covered conceptual roadway grades, which aim to smooth out the steep inclines currently experienced by drivers and pedestrians alike. This adjustment is expected to enhance safety and accessibility for all users.

As the discussion progressed, officials presented draft recommendations for the locations of the new bridges. The proposed Bourne Bridge would be situated to the right of the current structure, while the Sagamore Bridge would be positioned to the left. These recommendations take into account various factors, including property and environmental impacts, as well as associated costs.

A significant financial commitment was highlighted during the meeting, with a state transportation bond bill allocating $350 million to advance the project. To date, approximately $25 million has been spent on design and analysis, with the overall construction and design estimate reaching $4 billion. The Federal Highway Administration has also been designated as the lead federal agency for this extensive undertaking.

As the meeting concluded, it was clear that the canal bridges program represents a transformative opportunity for Cape Cod, promising not only improved infrastructure but also a more connected and accessible community for years to come.