General Info
Corridor IV is a multi-modal Northwest - Southeast transport link running from Dresden/Nürnberg (Germany), via Praha (Czech Republic), Wien (Austria)/Bratislava (Slovakia), Budapest (Hungary) to Romania.
In Romania Corridor IV divides into two branches. The northern branch runs from Arad via Bucuresti to Constanta at the Black Sea, the southern branch from Arad via Craiova to Sofija (Bulgaria) and divides again.
One branch running further to Thessaloniki (Greece) and the other to Istanbul (Turkey).
The Greek section Roads 
The Greek Seetion of the Corridor, i.e. Thessaloniki - Promahonas is part of the P.A.THE. (Patra – Athens – Thessaloniki - Promalion) axis. The axis has a total length of 104 km and consists of three main subsections: Thessaloniki - Derveni, Derveni - Lefkonas and Lefkonas - Promahonas.
Thessaloniki (Interchange I/C K4) - Derveni, 8 km:
This is a section with six lanes – 2 separate carriageways of 3 lanes.
Derveni - Lefkonas, 64 km:
is being constructed as a dual carriageway, 22 m wide.
Lefkonas - Promahonas, 32 km:
is being constructed as a dual carriageway, 22 m wide.
Railways
The section of Corridor IV on Greek territory between Kulata - Promahonas (GR) - Thessaloniki is 144 km long. It is a single-track electrified line, which complies with the standards AGC/AGTC. The gauge is according to the UIC standards, with the only restriction of the running speed over the bridges of the Strimonas and Gallikos rivers. The maximum axle load is 20 tons, while the maximum speed could reach the level of 120 km/h.
There are no branch lines apart from the connections with industrial units.
Projects are in progress for the improvement of the alignment and superstructures, which will allow maximum speeds of up to 160 km/h, elimination of gauge restrictions through the construction of new bridges over the Strimonas and Gallikos rivers, as well as the installation of remote control and signalling systems (1st level of ETCS) and the electrification of the line will be finished by 2008.
Official Maps
Greek section-Road map:
http://www.tinavienna.at/service/picts/norm/1129567505
Greek section-Railway map:
http://www.tinavienna.at/service/picts/norm/1129564316
Road map:
http://www.tinavienna.at/service/picts/norm/1129623544
Railway map:
http://www.tinavienna.at/service/picts/norm/1129622864
Official website:
http://www.tinavienna.at/corridor4/