Research Article
Impact of Tunnel Groups on Pupil Diameter of Drivers on Mountainous Freeway in China: A Real-World Driving Study
| | Serial number | Tunnel group | Name | Length (m) | Spacing with upstream tunnel (m) |
| | 1 | Jianyangping Tunnel group (ZK113 + 398∼ZK119 + 024) | Jianyangping Tunnel No. 2 | 1636 | — | | Jianyangping Tunnel No. 1 | 1420 | 97 | | Putou Tunnel | 2348 | 125 |
| | 2 | Lixian-Gambao Tunnel group (ZK94 + 861∼ZK107 + 126) | Lixian Tunnel | 5500 | — | | Weiguan Tunnel | 1159 | 306 | | Ganbao Tunnel | 4582 | 622 |
| | 3 | Mudui-Xindianzi Tunnel group (ZK86 + 940∼ZK92 + 932) | Mudui Tunnel | 2342 | — | | Puxitgou Tunnel | 394 | 80 | | Xindianzi Tunnel | 1871 | 305 |
| | 4 | Xuecheng-Tonghua tunnel group (ZK70 + 100∼ZK83 + 828) | Xuecheng Tunnel No. 2 | 185 | — | | Xuecheng Tunnel No. 1 | 3463 | 216 | | Gucheng Tunnel | 2911 | 342 | | Tonghua Tunnel No. 2 | 3025 | 332 | | Tonghua Tunnel No. 1 | 2475 | 105 |
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