Transversal Axis), labelled C-25, is a primary highway in Catalonia, Spain.

[2] According to the current coding for highways managed by the Generalitat de Catalunya, the first number C-25 indicates that is mainly a west-eastbound highway, and the second number C-25 indicates that is the fifth southernmost.

The road begins at the intersection with Autovía A-2, near Cervera (comarca of Segarra), and finishes at Cassà de la Selva (comarca of Gironès), with a total length of 141 km.

The main aims of the construction of this highway were: Despite these aims, the highway was built as a single-lane road and not as a freeway, and soon it was proved to become insufficient for the traffic supported.

[3] On 2007 the Generalitat de Catalunya approved the upgrading of the highway to a freeway, which started on 2008 and is expected to be completed on 2011.