Rousse is a major centre for transport. Two of the Pan European routes have their crossing point here: Corridor 7 and Corridor 9. The Danube waterway was connected in 1992 to the Main River and the Rhine River via the Europe Canal. Thus, Corridor 7 from Rotterdam to Thessalonica is the key axis of European inland waterways. Corridor 9 links North, Middle and East Europe to the Aegean Sea via Danube Bridge at Rousse and Giurgiu. To finalize that corridor, the railway line from Rousse to Podkova needs to be extended via the border with Greece to Komotini, and the motorway needs to be extended to Porto Lago likewise. The project for a tunnel under the Shipka Pass is on that corridor.