General information regarding the conditions of entry on the territory of Romania can be found here.
Information on the visa regime are available here.
Travel advice provided by the Ministry of Foreign Affairs can be seen here.
Travel by air:
The nearest airport to Arad is Timisoara Airport TSR (http://aerotim.ro/index.php?lang=en), located 50 km from Arad.
The largest airport hub closest to Arad is Budapest Airport BUD (http://www.bud.hu/english), located 250 km from Arad.
Travel by train:
Arad Train Station (Gara Arad)
Address: Piata Garii 8-9
Tel: 004 0257 231.777