Beijing Subway consists of 29 lines, 522 stations and 879 km network. System opened in 1971, making it China's oldest metro system. Currently operates 15 lines, including 24 rapid transit lines. Plans to reach 998.5 km network by 2025
First automated traffic signal system developed in Toronto in 1954. Phases indicate green signal periods for traffic movements. Movements are permitted paths through junctions. Stages are groups of non-conflicting phases moving simultaneously
Five lines totaling 111.8 km with 125 stations, mostly underground. Operates 1.4 million daily riders on weekdays. Largest rapid transit system in Italy and fifth longest in EU
System consists of 11 lines totaling 243.3 kilometers. Operates 159 stations as of 2024, with 36 more under construction. European and Asian sides connected through Marmaray. System operates 06:00 AM to 00:00 AM every 6-12 minutes
Speed bumps use vertical deflection to slow vehicle traffic. Speed humps have traverse distance of 3-4.3m, typically 8-10cm high. Speed cushions are multiple small bumps with spaces between them. Speed tables are long humps with flat sections for passenger cars
First passenger tram was Swansea and Mumbles Railway in Wales, UK (1807-1960). American streetcars developed first in 1832, followed by European systems in 1855. Horse-drawn trams dominated until 1957 in UK, some still operate in Isle of Man