The project, which took more than a year to complete, should help anchor future development in that area of Midtown dubbed the northern gateway, Mayor Linda Thompson said at a ribbon-cutting event Tuesday.
The improved area — adjacent to the future home of a new federal courthouse — could draw traffic from Interstate 81 and routes 22 and 322, diverting it away from the heavily traveled Front Street and Second Street corridors.
The Seventh Street widening took the street to four lanes from two with 13,000 feet of new sidewalks.
Improvements also were made at the Seventh and Reily and Seventh and Maclay intersections, as well as the Maclay Street bridge, which connects to Cameron Street and the Pennsylvania Farm Show Complex & Expo Center.
New street and pedestrian lights have been installed along the corridor and the bridge for better visibility and improved public safety.
Federal grant funds covered about 80 percent of the project, city spokesman Robert Philbin said.