M4 is a Hungarian expressway which will, upon completion, connect Budapest to Oradea and further Romanian cities. The route will travel in Hungary through Cegléd, Szolnok, Karcag, Püspökladány, Berettyóújfalu, and Nagykereki before reaching the Romanian border.
The M4 as seen heading towards the Romanian border, near Derecske, 27 December 2018
The M0-M4 interchange seen from the air, 20 June 2006. Notice the then-under construction section of the M0.
The A3 motorway is a partially built motorway in Romania, planned to connect Bucharest with the Transylvania region and the north-western part of the country. It will be 596 km long and will run along the route: Ploiești, Brașov, Făgăraș, Sighișoara, Târgu Mureș, Cluj-Napoca, Zalău and Oradea, connecting with Hungary's M4 motorway near Borș.
A3 motorway (Romania)
A3 motorway between Bucharest and Ploiești
A3 motorway near Snagov. The subsection between Bucharest and Moara Vlăsiei is the only motorway in Romania that currently has three lanes in each direction.
A3 motorway between Cluj-Napoca West (Gilău) and Turda