Core Points - The construction of the 108 New Line Expressway's sixth section has reached a significant milestone, with a cumulative excavation of 2,500 meters, marking over half of the total excavation completed [2] - The sixth section spans 5.21 kilometers and traverses complex geological and ecological areas, recognized as a challenging segment of the entire project [2] - The project is crucial for emergency response in the western mountainous regions of Beijing, especially after severe damage from extreme rainfall [3] Summary by Sections Construction Progress - Three tunnels are advancing simultaneously, with the completion of the left and right tunnel portals of the 1,700-meter-long Tanmugang Tunnel, which has achieved nearly 60% of its total excavation [2] - The construction team has implemented strategies to address challenges such as broken slate and water seepage, ensuring steady progress [3] Bridge Engineering - The construction of the Tanmugang Bridge's pier columns has reached a completion rate of 96%, while the North Port Special Bridge has successfully erected eight spans of beam slabs [3] - The U-turn ramp bridge completed all cast-in-place box girder pouring within nine days and has transitioned to upper structure construction [3] Importance of the Project - The 108 New Line Expressway is designated as a "lifeline" for the western region, enhancing disaster resilience and forming a dual-use transportation guarantee system [3] - The completion of this expressway will integrate with other highways to create three main horizontal emergency communication routes [3]