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With reference to internationally recognized statistical, urban rail transit is categorized into three major types, namely metro, light rail and tram. This analysis reviews the current status of urban rail transit operations worldwide. The findings show that by the end of 2024, 562 cities in 79 countries and regions around the world have opened urban rail transit systems, with a total length of more than 44,730.14 km. Subways, light rails, and streetcars each account for 51.24%, 10.43% and 38.34%, respectively. As of December 31, 2024, 65 cities in China (including Hong Kong, Macao and Taiwan) have operational rail transit systems, with an operating length of 12,844.57 km, of which the operating length in Chinese mainland is 12,168.77 km. In 2023, the metros of 188 cities in 59 countries around the world transported a total of 713.78 million passengers, with an average daily load of 0.85 million trips per kilometer. In China (including Hong Kong, Macao, and Taiwan), metro systems carried 31.81 billion trips annually. China's urban rail transit continues to grow steadily, with the size of its network and passenger volume ranking first globally. Additionally, 233 cities in 54 countries and regions have opened suburban railways, totaling 64,195.23 km, with 21 cities in China (including Hong Kong, Macao, and Taiwan) operating 2,974.40 km of suburban railways. An analysis of the scale and development of rail networks in key countries suggests that the construction of suburban railways in China, as well as the interconnection of different networks, holds significant potential.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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