BlackAndWhite on Instagram: "Chongqing Rail Transit in China is one of the most advanced and unique rail systems in the world, especially known for its ability to switch tracks with remarkable speed and precision. At stations like Bijin on Line 3 — the world’s longest straddle-type monorail line — the system uses a sliding crossover turnout that allows trains to change direction efficiently in under 30 seconds. This massive mechanism, weighing about 120 tons, slides 4.25 meters to align the trac