Pan-European Corridor Xa
Pan-European Corridor X highlighted in red
Major junctions
Start end	Graz (Austria)
End end	Zagreb (Croatia)
Location
Countries	Austria, Slovenia, and Croatia
Highway system
Pan-European corridors

The Corridor Xa is a branch of the Pan-European Corridor X. It runs north–south between the cities of Graz and Zagreb through three countries: Austria, Slovenia and Croatia. The road route of Corridor Xa is concurrent with the European route E59 throughout its entire length.

The corridor starts at the A9 (Pyhrn Autobahn) highway in Graz, Austria. It follows the highway from the junction with the A2 and the European route E66 for 41 km (25 mi) to the border with Slovenia at Spielfeld.

In Slovenia the corridor continues from the Austrian border at Šentilj for 25 km (16 mi) along the A1 motorway (Slovenika) to the city of Maribor and the Slivnica. There it switches to the A4 motorway for 20 km (12 mi) until Draženci near Ptuj, continuing (while A4 construction is in progress) on the G9 main road for a few dozen kilometers to the Croatian border at Gruškovje.

In Croatia the corridor follows the A2 toll highway for 64 km (40 mi) from Macelj to Zagreb outskirts. The highway has three to six lanes throughout its entire length. Upon approaching Zaprešić interchange in suburban Zagreb, small backups on the mainline toll plaza are encountered at all times of day. The last part of the Corridor between Zaprešić and Lučko interchanges is part of the Zagreb bypass. Congestion can be bad at rush hour near interchanges, though.