The Lynbrook Viaduct, built in 1936, serves the Babylon and Long Beach Branches in the Village of Lynbrook in the Town of Hempstead. The concrete viaduct has two island platforms and is affiliated with the raised Lynbrook Train Station. The Viaduct is being rehabilitated and repaired, including improvements to the existing drainage system. Construction began in June 2019 and is expected to be completed in Q3 2020. The Lynbrook Viaduct is being rehabilitated in conjunction with the rehabilitation of the Rockville Centre Viaduct.