Gradiška – Banja Luka highway - Autoput Gradiška–Banja Luka
|Gradiška – Banja Luka highway in BiH|
|Operator:||JP Autoputevi Republike Srpske|
|Overall length:||26,5 km|
|of which in operation:||26,5 km|
The Autoput Gradiška – Banja Luka ( Bosnian / Serbian for 'Motorway Gradiška – Banja Luka') is a motorway in Bosnia and Herzegovina . The motorway has largely been completed or is under construction. The section from Čatrnja to Mahovljani was opened to traffic on November 30, 2011. 
Due to political differences between the two entities of Bosnia and Herzegovina, the Federation of Bosnia and Herzegovina and the Republika Srpska , about the number allocation of the new highways to be built, it is currently not foreseeable which number this highway will get. It is possible that the motorway is signposted as A-2, but this number is more for a west-east connection from the Croatian border near Izačić via Bihać , Jajce , Travnik , Sarajevo and Foča to Šćepan Polje on the MontenegrinLimit in conversation. At the beginning of February 2011, the Bosnian-Serbian politician Milorad Dodik said that the part between Gradiška and Banja Luka will be completed by June 2011.  Other Bosnian politicians stated that this would not mean that the above course and the numbering as A-2 had been agreed, but the connection from Gradiška to Banja Luka, as a supplement to the actual part of the A- 2 could serve.
The motorway is currently signposted as E-661, which corresponds to the European road numbering.
The 26.5 km long section from Gradiška to Mahovljani was officially opened to traffic on November 30, 2011.  The motorway currently ends at Klašnice, from there a four-lane motorway-like road (M-16) continues to Banja Luka. The Mahovljani motorway junction was opened to traffic in July, so the motorway is continuously passable.
- Course of the Autobahn on motorways-exitlists.com
- Soon a public tender for the construction of the Banja Luka-Kupres motorway
- Banja Luka – Gradiska motorway opening after 7 years
- http://rtrs.tv/vijesti/vijest.php?id=50676 Eröffnung Gradiška - Mahovljani