Starting July 29, Harmony Road will be closed between Capitol Trail and Greenbridge Road for approximately six weeks for a bridge repair project.
The closure had been scheduled to start July 15, but officials announced Friday it was being delayed.
The road east of Newark connects Capitol Trail and Ogletown-Stanton Road and provides access to the Harmony Hills, Lexington Square, Sheffield Manor and Brookhaven neighborhoods.
Traffic will be detoured via Red Mill Road.
The Delaware Department of Transportation said the closure is necessary to allow crews to replace the concrete deck on a structurally deficient bridge over White Clay Creek.
The road will reopen in mid-September.