Interstate 79 Projects
Interstate 79 (I-79) is an Interstate Highway and a primary thoroughfare through western Pennsylvania. In District 11, I-79 goes through Allegheny and Lawrence counties starting at Mile Marker 50 and ending at Mile Marker 78 in Allegheny and extending in Lawrence from Mile Marker 105 to 111.
Multiple projects are planned and ongoing on this interstate. Updates are added to the pages as detours are implemented and work is completed. We appreciate your patience and thoughtful feedback as we strive to improve Pennsylvania's transportation system.
Please select a project below to learn more about the work being done.