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Tobin Memorial Bridge

The Massachusetts Port Authority requested a broad review of lighting issues relating to the Tobin Bridge. The scope of services for the preliminary phase of design comprised assessing architectural (“aesthetic”) lighting concepts from an earlier study for the main steel truss span and proposing enhancements and alternatives, including renewable power, in addition to evaluating roadway lighting, navigation lighting and communications.

 

As part of the aesthetic lighting evaluation and preliminary design, WSP USA conducted visualizations and assembled a cost estimate. The product of this phase is a report showing renderings of proposed lighting schemes, fixture descriptions and costs. A goal of the modernization effort is to improve functionality and illumination of the structure. 

For roadway lighting of the lower deck our firm designed a new system to replace fixtures that had deteriorated after years of exposure to salt and vibration. The upgrade features fixtures commonly selected for tunnels and attached on the bridge with specially detailed strut work to the structure supporting the upper deck. The strategy developed from our experience in both roadway and tunnel lighting design. The new fixture locations allow easier maintenance with less traffic disruption. 

We also consulted on communication improvements to facilitate toll collection, maintenance, security and emergency response, including design of a new fiber A/V link routed in the lower deck roadway handrail.