DECATUR — Motorists crossing the Tennessee River bridges on I-65 should expect lane closures tonight and Sunday night.

The work is part of the bridges’ $23.7 million rehabilitation project, the Alabama Department of Transportation said.

Weather permitting, subcontractors will implement single-lane closures for work on bridge rails and guardrail from 6 p.m. tonight to 5 a.m. Friday; and from 6 p.m. Sunday to 5 a.m. Monday.

Both nights, the crews will work on the northbound bridge first, then shift operations to the southbound bridge.

For real-time traffic and road condition updates, visit ALGOTraffic.com.

ALDOT expects the rehabilitation to be completed this fall. The project, which includes repairing concrete and cleaning, painting, and repairing structural steel on the 50-year-old bridges, remains ahead of schedule.