New York State Department of Transportation’s Route 1 Bridge over the Mamaroneck River

UPDATE as of 11/10/2023 at 8:39PM: The New York State Department of Transportation is advising Westchester County stakeholders in the Village of Mamaroneck that construction work will take place starting on or about Sunday, November 12 to replace underground drainage along US Route 1 (Boston Post Road) between Mamaroneck and Spruce Street. This work will take place at night, from 9 PM to 7 AM from Sunday to Thursday and should last for approximately 2 weeks. This work may generate noise during evening hours and may require continued intermittent lane closures.

The New York State Department of Transportation (NYSDOT) has initiated work on the Route 1 Bridge (a.k.a. East Boston Post Road) over the Mamaroneck River. This project is part of a multi-faceted project in Westchester County, which also includes the East Lincoln Avenue bridge in Pelham and Mount Vernon and the Saw Mill River Parkway bridges over the Saw Mill River.

The U.S. Route 1 stone arch bridge over the Mamaroneck River will be reinforced and strengthened with a steel liner installed underneath the bridge. The structure supporting part of Harbor Island Park at the southeast corner of U.S. Route 1 (a.k.a. East Boston Post Road) and Mamaroneck Avenue (commonly referred to as Harbor Island "Pocket" Park) will be removed and replaced. The Pocket park will be reconstructed and a new sidewalk will also be installed on the southside of the new bridge. Two lanes of traffic in each direction will be maintained throughout construction.

For more information, click here for NYSDOT PDF factsheet. And to learn more about the project, visit www.lowerwestchesterbridges.com.

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UPDATE as of 10/16/2023 at 2:45PM: The New York State Department of Transportation is advising Westchester County stakeholders in the Village of Mamaroneck that construction work will take place starting on or about Monday, October 23 to transfer the existing sewer line to a new sewer line along US Route 1 (Boston Post Road) between Mamaroneck and Spruce Street. This work will take place 24 hours per day and should last for approximately 7 days. This work may generate noise and odor during work hours, including evening hours, and may require continued intermittent lane closures.

UPDATE as of 09/29/2023: Beginning Friday, September 29th, the north sidewalk of Boston Post Road/US Route 1 in Mamaroneck will be closed to pedestrian traffic to facilitate construction for continued improvements along Boston Post Road/US Route 1. A portion of the north sidewalk, east of the bridge, will have limited access to the businesses along north Boston Post Road/US Route 1. Pedestrians may use the newly opened south sidewalk. The east crosswalk at  Boston Post Road/US Route 1 and Mamaroneck Avenue will be closed. Pedestrians may use the west crosswalk. Please refer to this graphic for a detour map for pedestrians.

UPDATE as of 09/27/2023: The New York State Department of Transportation is advising Westchester County motorists that one lane of US Route 1 (Boston Post Road) northbound and southbound will be closed between Mamaroneck Avenue and Spruce Street in the Village of Mamaroneck. Night work to facilitate sewer installation will take place on Wednesday, September 27 at 10 p.m. through Thursday, September 28, 2023, at 6 a.m., weather permitting.

UPDATE as of 08/28/2023: The New York State Department of Transportation is advising Westchester County motorists that one lane of US Route 1 (Boston Post Road) northbound and southbound will continue to be closed between Mamaroneck Avenue and Spruce Street in the Village of Mamaroneck. Night work to facilitate sewer installation will take place on Wednesday, August 30 at 10 p.m. through Thursday, August 31, 2023, at 6 a.m., weather permitting.

UPDATE as of 07/07/2023: One lane of U.S. Route 1 (Boston Post Road) in each direction will close between Mamaroneck Avenue and Spruce Street in the Village of Mamaroneck, beginning at 7 a.m. on Monday, July 10, through Monday, September 4, weather permitting. Click here for more information.

UPDATE as of 03/28/2022: One lane of US Route 1 (Boston Post Road) northbound and southbound will be closed with flaggers on scene for traffic control, between Library Lane and Spruce Street in the Village of Mamaroneck, daily beginning Monday, March 28 through Saturday, December 31, between 9 a.m. and 4:30 p.m. to facilitate utility work. Click here for more information.

UPDATE as of 12/03/2021: Beginning Monday, December 6 through Friday, December 10, night work will take place on the Route 1 Bridge Project in Mamaroneck. One lane of traffic will be maintained in each direction during the work, which is necessary to complete utility replacement.

UPDATE as of 10/05/2021: Beginning Wednesday, October 6, utility work will begin on Route 1 at Spruce Street in the Village of Mamaroneck. This daytime work is expected to continue for approximately 2.5 weeks, through October 22.

UPDATE as of 09/16/2021: Beginning Monday, September 20, a night shift from 3:30pm-12am will be in place following daytime work on the New York State Department of Transportation’s Route 1 Bridge Project in Mamaroneck. This work involves excavation and installation of a utility ductbank, and is expected to continue for approximately 2 weeks. Crews will make every effort to minimize noise impacts after 8pm. Please note that it is possible this work may be moved to the week of Monday, September 27.  

UPDATE as of 08/30/2021: Beginning Tuesday, September 7 through Wednesday, September 8, a lane closure will be in place on the Route 1 Bridge Project to perform a necessary gas main tie-in. One lane of traffic will be maintained in each direction on Route 1 between Library Lane and Spruce Street. Crews will be on site around the clock until the tie-in is completed. Noise impacts are expected to be minimal. Please note that it is possible that ConEd may push this work to September 8 and 9.

UPDATE as of 08/10/2021: Please be advised that night work will take place on the Route 1 bridge project in Mamaroneck from Monday, August 16 to Friday, August 20. One lane of traffic will be maintained in each direction on Route 1 between Library Lane and Spruce Street during the night shift, which is expected to take place from 3pm to 11pm. This work is necessary to facilitate utility work related to the bridge project. Per conversations with the Village of Mamaroneck and upon monitoring daily traffic during work on the project thus far, this night shift was moved from 6pm-3am to 3pm-11pm to minimize impact to the community.

UPDATE as of 08/04/2021: Night-time construction and utility work related to the Route 1 Bridge project in Mamaroneck is expected to continue through the night of Friday, August 6.

UPDATE as of 06/29/2021: On Tuesday, July 6, Meighan Park at Harbor Island Park (a.k.a. The "Pocket" Park) on the southeast corner of U.S. Route 1 (a.k.a. East Boston Post Road) and Mamaroneck Avenue will be closed. Demolition of Meighan Park (the "pocket" park) will begin and the park will remain closed for the duration of the project. The structure supporting the park needs to be reconstructed and the park will be replaced at the end of the project. Please click here and note that this closure will not impact access to the park/beach or marina and pedestrian access (sidewalk and crosswalk) will be maintained.

UPDATE as of 06/03/2021: Road work (test pitting) will begin on Route 1 near Mamaroneck Ave starting Monday, June 7. The work will take place for about 3 weeks, weather permitting, and will include lane closures from approximately 9am-3:30pm. A minimum of one lane of traffic in each direction will be maintained for the duration of this work.