Various embodiments disclosed herein relate to support structures for transportation systems. In some embodiments, the support structure comprises a self-supporting arch assembly. The self-supporting arch assembly can be configured to support one or more devices in a transportation system, such as an antenna assembly configured to communicate with a train. In other embodiments, the support structure can comprise a hinged mast assembly comprising a hinge assembly and mast coupled to the hinge assembly. A device, such as an antenna assembly can be disposed at a distal portion of the mast.

Various embodiments disclosed herein relate to support structures for transportation systems. In some embodiments, the support structure comprises a self-supporting arch assembly. The self-supporting arch assembly can be configured to support one or more devices in a transportation system, such as an antenna assembly configured to communicate with a train. In other embodiments, the support structure can comprise a hinged mast assembly comprising a hinge assembly and mast coupled to the hinge assembly. A device, such as an antenna assembly can be disposed at a distal portion of the mast.