# Visual characteristics of drivers in different directions and lengths of gradual landscape zones in extra-long highway tunnels

> Research article (Tunnelling and Underground Space Technology, 2023) · cited 31× · AI/ML

**Wikidata**: [openalex:W4365813566](https://www.wikidata.org/wiki/openalex:W4365813566)  
**Source**: https://4ort.xyz/entity/visual-characteristics-of-drivers-in-different-directions-and-lengths-of-gradual-landscape-zones-in-extra-long-highway-t