State transportation authorities advise that construction will affect motorists on the following state roadways this week:
* U.S. 1 Northbound -- Traffic from Miller Road to Sheradale Drive has been switched to the new three-lane roadway while the southbound lanes are reconstructed. There will be two lanes of traffic southbound until noon, and then two lanes northbound. A concrete barrier prevents left turns to and from Miller Road.
* I-95 North -- Single lane closures in northbound lanes from 7 a.m. to 3 p.m. Single lane closures southbound from White Marsh Boulevard to the Baltimore Beltway from 9 a.m. to 3 p.m. daily and 6 a.m. to 11 a.m. Saturday. Expect lane closings in both directions for paving and construction from 7 p.m. to 6 a.m.