The widening of Taiwan’s first national freeway, National Freeway #1, included the reconstruction of three bridges which had failed to conform to new flood control requirements. TYLI Taiwan adopted a new “Lateral Slide Construction” method for this Project.
- A temporary bridge girder will first be constructed alongside the original bridge in order to keep the old bridge open to traffic during the Project. Two-way traffic will continue travel in two lanes in either direction (with a 1-meter inside shoulder and 2.5-meter to 3-meter outside shoulder width).
- The temporary bridge girder will be moved laterally into position to become part of the widened structure, maintaining the original alignment and saving on girder cost.
- Once the temporary bridge is in place, construction will begin on the new bridge.
- After the new bridge has been completed, the temporary bridge structure will be demolished.