Today, crews are planning to make repairs to the crossing on Highway 39 at Corinne.
Motorists are advised to watch for equipment and people working.
Tomorrow, crews will be repairing the crossing on Highway 13 in Weyburn, just east of the junction of Highways 13 and 39.
Motorists will be required to reduce their speed and should be prepared to stop.
Detours will be in place for about 24 hours.