Abstract: An elevated roadway for autonomous vehicles may include a pylon extending vertically from a ground anchor and comprising a metal tube defining a central cavity and a concrete column within the central cavity. The elevated roadway further includes a bracket coupled to the pylon and comprising a mounting plate secured to the pylon and a cantilevered road support member extending from the mounting plate. The elevated roadway may further include a cantilevered road section coupled to the pylon via the cantilevered road support member and comprising a joist structure structurally coupled to the cantilevered road support member, a road member above the joist structure and supported by the joist structure, and first and second side barriers along first and second sides of the road member, respectively. The road member may be adapted to receive a four-wheeled roadway vehicle.

Abstract: A dismountable bridge comprises at least one bridge section including a top deck and a bottom boom disposed underneath the top deck. The bottom boom includes a mechanism for adjusting the length of the bottom boom. Rigid end supports each have one end hinged to a respective one of the ends of the top deck and have another end hinged to a respective one of the ends of the bottom boom. Tension elements are disposed laterally of the bridge section and are stressed only tensionally. Each tension element has one end hinged to one end of the top deck and another end hinged to an end of the bottom boom opposite to the one end of the top deck. The bridge section can be changed from a transport position, in which the top deck and the bottom boom are collapsed for maintaining a low height for transporting, and into an operating position in which the top deck is remote from the bottom boom at least at one end of the bridge section.

Abstract: A deployable bridge includes a plurality of identical bridge sections each having two identical track elements. Each track element has a roadway carrier, a bottom boom and adjustment elements connecting the bottom boom with the roadway carrier. The bottom boom of each track element includes a mid section and two end sections flanking the mid section. Each track element further comprises pillars having opposite first and second ends. The first end of the pillars is articulated to the mid section of the bottom boom. Each track element also has a drive shaft assembly suspended from the track element; spindle sleeves inserted on the drive shaft assembly; and a spindle head threadedly mounted on each spindle sleeve. The pillars are articulated by the second end thereof to a respective spindle head.

Abstract: A separable bridge, particularly useful for military purposes, having bridge modules which can be coupled together and whose roadway elements, diagonal elements and lower chords form a vertically adjustable framework. The lower chords of the bridge modules are shorter than the roadway element of that bridge module, and the diagonal elements are fastened to ends of the lower chords. The roadway elements have a plurality of fastening points for the diagonal elements and the lower chords. These fastening points are located at different distances from an end of the roadway element. The roadway element, the lower chords and the diagonal elements have constant lengths.

Abstract: A collapsible bridge for military purposes is assembled from a plurality of similarly constructed and interconnected bridge elements, each including two track plates, two girders and several length adjusted diagonal struts and tie rods, interconnected and configured so that the angular orientation of the girders is adjustable in relation to the track places, these adjustments being different for different bridge elements such that either the interconnected track plates or the interconnected girders or both approximate arches.

Abstract: A modular lightweight bridge comprises a pair of tubular truss formed spans, each of which include a plurality of modules hinged to one another at locations on the bottom of the bridge for folding the bridge for transport prior to deployment of the bridge. Each span has a unique high strength fabric deck or roadway surface tensioned across the upper side of the truss chord members. The bridge is uniquely captively mounted on a trailer by rollers for transporting the bridge when it is in its folded mode. When the bridge is to be deployed, each span is unfolded by pivoting the modules with respect to one another about vertical axes so that the spans expand longitudinally with respect to the trailer. The spans are then pivoted 90.degree. downwardly about longitudinally extending horizontal axes and the bridge rolled rearwardly from the trailer over the gap to be spanned.

Abstract: A temporary, modular, self-erecting bridge which can be transported from place-to-place by collapsing the side, top and bottom elements about pivot points to achieve a narrow and shorter unit. Hydraulic jacks or other fluid actuated mechanisms are used to expand and contract the elements.