A mobile bridge of great length is a support construction for at least one transport means, which particularly avoids constraints and undefined stresses as a result of temperature variations and/or support lowering movements, for example, to the greatest possible extent. This will guarantee a statically definite system, is essentially accomplished in that the bridge, in its totality, forms a multi-member statically definite system in the vertical plane, and a statically definite continuous carrier in the horizontal plane. The bridge segments of the bridge are connected with one another, in articulated manner, exclusively in the vertical plane, and the bridge is supported by means of at least three bearing mechanisms of a type A, B, and C having different static valence. Each bearing mechanism of the type A, B, C is carried by a self-propelled, tip-proof traveling mechanism.