The HZ21/HZ24/HZ26 Mechanized Fast Bridge is a vehicle-carried emergency bridging system—its erection and retrieval are fully completed by the accompanying vehicle itself, no external equipment required. Designed primarily to serve as a temporary passageway for overcoming obstacles like small and medium-sized rivers and dry gaps, it ensures rapid passage of all vehicle types with a tracked load up to MLC70, making it ideal for time-sensitive emergency response and military tactical maneuvers.