Before revision: Its benefits for pedestrian flow and safety have led to new examples being installed in many countries in recent years, including the world's busiest pedestrian intersection at Shibuya, Tokyo , which began operation in 1973.
After revision: Its benefits for pedestrian flow and safety have led to new examples being installed in many countries in recent years including the world's busiest pedestrian intersection at Shibuya, Tokyo , which began operation in 1973.