NEW ORLEANS — Lengthy disruptions to Amtrak’s City of New Orleans ended Tuesday, with the restoration of full service over the route between Chicago and New Orleans.

Since May, a combination of scheduled track work, floodgates which had to be opened on a spillway near New Orleans, and other restrictions have meant that passengers were bused for about 180 miles between Jackson, Miss., and New Orleans. That has now ended.

Amtrak is marking the occasion with a ticket sale on the route, offering buy-one, get-one-free fares for both coach and sleeping-car accommodations for travel on the City of New Orleans through September, if purchased by Aug. 31. Details are available at the Amtrak website.