Several major roadways will experience nightly closures for construction and repairs starting next week. Highway 1 in California will have overnight lane closures from September 15 to 20 for the Highway 1 Corridor Project, which includes widening the center median and adding auxiliary lanes. Similarly, Interstate Highway 80 in San Francisco will see nightly lane closures starting Monday for barrier repairs. The Parkway West in Pennsylvania will have ramp closures for milling and paving from September 16 to 20, and I-26 in North Carolina will be closed overnight on Monday and Tuesday for a widening project. These projects aim to improve traffic flow and safety but will require detours and alternative routes during the closure periods.