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In order to explore the influence of road section characteristics on path redundancy and the redundancy ability of road traffic networks under emergencies，based on the traditional method of path redundancy quantity in road networks，considering the efficiency difference and overlap degree between effective paths，a redundancy evaluation model based on path diversity and redundancy ability under emergencies was constructed. The influence of different costs on path diversity and the influence of emergencies on redundancy ability were analyzed，and the sensitivity analysis of redundancy ability was carried out. The results show that the path diversity in the road traffic network depends on the type of travel path cost and the difference between the travel cost of the road section. The closer the travel cost of the road section is，the higher the number of effective paths is，and the higher the path diversity is. In the emergency scenario，the redundancy of the road network depends on the importance of the failed road section. The more important the failed road section is，the lower the network redundancy is. The increase of travel cost tolerance within a certain range helps to improve the redundancy capacity of the road network during emergencies. Too high or too low travel cost tolerance will not significantly improve the redundancy capacity of the network.
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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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