Autoroute 28 is a motorway linking Abbeville in the Somme to Tours in Indre-et-Loire. It is 405 km long. The motorway starts at Abbeville, France, splitting from the A16 and, after merging with the A13 near Rouen, ends at Tours, merging with the A10. The motorway between Rouen and Tours was added to the Schéma Directeur Routier National in 1987. Between Abbeville and Rouen, the motorway was built by the Ministry of the Equipment and Transports. 97 km long, this portion of motorway is toll-free.
Between Rouen and Alençon, the motorway is operated by Alis (partly own by Sanef) and is the first autoroute of France to have had offers by European companies following the withdrawal of the SAPN in 1998 despite its contract initiated in 1995. The second stretch of road, opened on 27 October 2005, is 125 km long and passes over two large viaducts; the Viaduc de la Risle and the Viaduc du Bec.
The third stretch of road, between Alençon and the A10 near Tours is operated by Cofiroute. A portion of road between Écommoy and Tours was prevented from being built due to the presence of a protected species of beetle, Osmoderma Eremita or the Pique Prune. Construction began only in 2004, and the stretch was opened on 14 December.