Introduction to the bridge: The bridge is divided into upper and lower floors. The upper floor is a wide suspended walkway with glass windows on both sides. Pedestrians passing through the bridge can enjoy the beautiful scenery on both sides of the Thames; the lower floor It can be used by vehicles. The two movable bridge decks each weigh 1,000 tons. When a ship of 10,000 tons passes on the Thames River, the machine in the main tower starts, and the bridge slowly separates and folds upward. After the ship passes, the bridge slowly Fall down and resume vehicular traffic.