Abstract: A method of reconstructing existing roadway (21) on order to restore structural integrity of bridge roadway (23) with minimal disruption of traffic. First elevated roadway (41), which comprises a plurality of interconnected ramp units and bridging units, is erected in multiple steps by initially erecting an initial portion of roadway (41) from entrance/exit ramp units (45) and (46) with their uppermost ends facing each other. Then repeatedly, during periods of off-peak traffic, until roadway (41) is erected, performing a step of creating a gap in a previously erected portion of roadway (41) by moving ramp unit (45) along roadway (21), erecting a bridging unit in the gap, and opening an extended portion of roadway (41) to traffic prior to the next period of peak traffic. Structural integrity of roadway (23) is then restored by repeatedly closing a number of existing travel lanes to traffic, while rerouting traffic onto the newly erected roadway (41), and restoring the closed travel lanes without interruption.

Abstract: A method of erecting a new elevated roadway (41) above an existing roadway (21) in order to increase traffic capacity of bridge roadway (23) with minimal disruption of existing traffic. Roadway (41), which comprises a plurality of interconnected ramp units and bridging units, is erected in multiple steps by initially erecting entrance/exit ramp unit (46) and moveable ramp unit (45) with their uppermost ends facing each other, then intermittently, during periods of off-peak traffic, creating a gap in a previously erected portion of roadway (41) by moving ramp unit (45) along roadway (21), erecting a bridging unit in the gap, and opening an extended portion of roadway (41) to traffic in time for the next period of peak traffic. This method can be used for reconstructing different types of bridges and highways.

Abstract: A method of reconstructing existing roadway (21) on order to restore structural integrity of bridge roadway (23) with minimal disruption of traffic. First elevated roadway (41), which comprises a plurality of interconnected ramp units and bridging units, is erected in multiple steps by initially erecting an initial portion of roadway (41) from entrance/exit ramp units (45) and (46) with their uppermost ends facing each other. Then repeatedly, during periods of off-peak traffic, until roadway (41) is erected, performing a step of creating a gap in a previously erected portion of roadway (41) by moving ramp unit (45) along roadway (21), erecting a bridging unit in the gap, and opening an extended portion of roadway (41) to traffic prior to the next period of peak traffic. Structural integrity of roadway (23) is then restored by repeatedly closing a number of existing travel lanes to traffic, while rerouting traffic onto the newly erected roadway (41), and restoring the closed travel lanes without interruption.

Abstract: A method of erecting a new elevated roadway (41) above an existing roadway (21) in order to increase traffic capacity and restore structural integrity of bridge roadway (23) with minimal disruption of traffic. Roadway (41), which comprises a plurality of interconnected ramp units and bridging units, is erected in multiple steps by initially erecting entrance/exit ramp units (43) and (45) with their uppermost ends facing each other. Then intermittently, during periods of off-peak traffic, creating a gap in a previously erected portion of roadway (41) by moving ramp unit (45) along roadway (21), erecting a bridging unit in the gap, and opening an extended portion of roadway (41) to traffic during periods of peak traffic. Structural integrity of roadway (23) is then restored by repeatedly closing a number of existing travel lanes to traffic, while rerouting traffic onto the newly erected roadway (41), and restoring structural integrity of the closed travel lanes without interruption.