RoeEE / GySEV : The Raab-Oedenburg-Ebenfurter Eisenbahn Aktiengesellschaft was incorporated by statute in 1872, and is probably the world's oldest continuously-working railway operator. Promoted by Baron Viktor Erlanger in order to facilitate the movement of grain from Győr around Wien which had become a bottleneck. The first concession ran from 1879 for 90 years.

Also known as GySEV (the Hungarian name Győr-Sopron-Ebenfurti Vasút Rt.), the railway was originally contained within the borders of the Austro-Hungarian Empire. After the country's partition in 1918, the railway crossed the international boundary between Austria and Hungary near Sopron. The railway, however, was not divided, and in 1923 the concession in the new state of Austria was replaced by a similar concession to RoeEE AG, a private company registered in Austria, but wholly owned by GySEV. The parent company has its' headquarters in Budapest, Hungary, but has main offices each country. The parent company is owned by the two states it connects (33.3% Austria, 61 % Hungary) , by the German firm Hamburger Hafen und Lagerhaus Ag (4.3%) and 1.4% by private individuals.

The RoeEE AG operates passenger and goods traffic by railway between Győr and Ebenfurth via Sopron, and between Fertőszentmiklós and Neusiedl am, which it has operated under contract since 1897 with Neusiedler Seebahn Aktiengesellschaft. A secondary line from Sopron south to Szombathly is also operated by the firm. The company also operates a narrow gauge line at Fertöboz, on the Sopron - Györ line. The Széchenyi line is a former standard gauge line, regauged and extended. There is also an open-air collection of plinthed locomotives at the main station, which is only just over the Austrian-Hungarian border. The original corporation still exists and has a current concession to operate until 2007. Today the company has rinning righst over the Hungarian MAV railway system to a number of destinations.

Goods traffic is still very importanat to RoeEE, with much international traffic between Turkey, Hungary, Austria, Romania, Greece and Bulgaria travelling along their lines. The company also operates a RoLa (rolling highway) between Sopron and Wels, with five return journeys being made each day. The firm also provides just-in-time freight services for several car companies with factories in Hungary, and moves over 200 trains of Audi vehicles a year from their Hungarian plants.

In 1990 GySEV set up a logistics company at Sopron, which now covers customs facilities and transit arrangements, as well as freight forwarding and warehousing. The company currently has about 30 locomotives, including several Taurus dual-voltage locos, and a steam engine dating from the opening day of the line, which has never retired, but is now not used on service trains. Unlike the 15kV of ÖBB lines, electrified railways in Hungary are electrified at 25 kV, thus the need for dual voltage electrics on cross-border trains.

There are administrative offices at H-1011 Budapest, H-9400 Sopron, and A-7041 Wulkaprodersdorf.