Urban rail transit - Wikipedia

Rapid transit - Wikipedia

Top 7 Longest Urban Rail Systems in China (A-Z) [All data from Wikipedia; under construction data may be incomplete for some cities] : r/Subways

Urban public transport statistics Home - Urban public transport statistics - UNECE Wiki

The strike-proof Docklands Light Railway has gone on strike, The Independent

Light Rail: Most Up-to-Date Encyclopedia, News & Reviews

Urban rail transit in India - Wikipedia

Top 7 Longest Urban Rail Systems in China (A-Z) [All data from Wikipedia; under construction data may be incomplete for some cities] : r/Subways

Seattle Light Rail Breaks Ridership Record; Still Shy of 2010 Projections

Light rail in the United States - Wikipedia