 Completed in 1907, the 1700-foot-long Henry Wadsworth Longfellow Bridge is considered the most important historic bridge in the city of Boston due to its outstanding architectural quality and prominent location over the Charles River. The bridge carries trains, cars, bikes and pedestrians handling 28,000 motor vehicles and close to 100,000 transit riders on an average day. As the busiest multimodal link between Boston and Cambridge, decades of deterioration and lack of maintenance left the bridge structurally deficient. In 2013, an extensive five-year phased restoration plan was developed to address the bridge's structural and code deficiencies while retaining its historic character. With advice and oversight from six federal, state and local historic agencies, the bridge was restored using the highest rehabilitation and restoration standards. The project used historic rivet construction methods on exterior steelwork visible to the public. The original steel buckle plates were restored or replicated to support the bridge deck, while structural repairs and replacements were made to the historic steel arches and spandrel columns. Cast iron railings were restored and the granite masonry cleaned. Original historic lighting fixtures were replicated and installed as part of a new functional and aesthetic lighting system. In response to public input, sidewalks were widened and protected bicycle lanes were installed to enhance safety. The bridge was reconnected to its original riverfront setting through thoughtful landscaping. And all this work was done while the bridge remained in active daily use. This successful $305 million infrastructure project serves as a national model, demonstrating how a 100-year-old bridge can be restored to comply to modern codes while also preserving its distinct historic character and architectural integrity.