A broken water main under Ray Road near Lynn Road closed a section of it to traffic Friday morning.
Police said Ray was shut down between Lynn Road and Winthrop Drive.
Drivers were being advised to use Lynn and Leesville roads to go around the affected section of Ray Road.
Public Utilities Department workers will have to dig up Ray Road for the repair, so the street will be closed for “an extended period,” police said.
No time estimate was immediately available.
Police said water customers in the affected section of Ray Road had not lost service.