The construction of Memorial Drive began in 1897 as part of the Charles River Basin project, a comprehensive urban renewal effort aimed at revitalizing the area along the Charles River. The project aimed to create a park-like environment along the river, enhancing recreational opportunities and providing open spaces for the public. Originally known as
Charles River Road, the road was officially renamed "Memorial Drive" in 1923 to honor the memory of the Massachusetts soldiers who had served and given their lives during
World War I. In 1985, the Massachusetts Legislature passed a law requiring that the Metropolitan District Commission (later renamed the
Department of Conservation and Recreation) close Memorial Drive between Gerry’s Landing Road and Western Avenue between 11 a.m. to 7 p.m., every Sunday from the end of April until mid-November. With the closure of indoor recreation opportunities resulting from the
COVID-19 pandemic in 2020, the Cambridge City Council asked DCR to close the area on Saturdays as well. The DCR agreed and scheduled Saturday and Sunday closures for pedestrians and cyclists through 2022. In April 2023, the DCR announced that it would be returning to its pre-pandemic schedule, and would no longer close Memorial Drive for pedestrians and cyclists on Saturdays going forward. Parking is allowed on the westbound side of Memorial Drive for a short segment after JFK Street (except during rush hours, 7am-10am and 4pm-6pm), often surprising motorists in the right lane as there is no change in pavement markings. In 2003, a two-mile section of Memorial Drive (from the Longfellow Bridge to the BU Bridge) was reconstructed ("Memorial Drive Greenway Phase I") as part of the Metropolitan District Commission's Historic Parkways Initiative to improve the safety and function of the roadway. This dropped one eastbound lane and some parking. Reconstruction of the segment from JFK Street to the Eliot Bridge is planned to begin in 2025 ("Memorial Drive Greenway Phase III), enacting a
road diet by reducing travel from two to one lane in each direction (except at traffic lights), adding a separate and wider bicycle path, removing part of Gerry's Landing Road, and adding a pedestrian crossing at Sparks Street. The reduction to one lane will eliminate westbound roadway parking, but there will be a
scull loading area added on the eastbound side on a different stretch, near the Cambridge Boat Club. Reconstruction of the segment between JFK Street and the BU Bridge has been postponed indefinitely, until a more detailed traffic study can be performed. An estimated $46.5
MassDOT project to repair, rebuild, or replace the MassDOT-owned Reid Overpass (which bypasses the DCR-owned rotary) is scheduled and funded for 2027, with planning underway in 2024. ==Route description==