Chandigarh–Shimla Expressway
The Shimla Chandigarh Expressway is an under construction   long expressway connecting Chandigarh to Shimla stretch of National Highway 5 (India).The four laning project involves the creation of 11 tunnels between Maliana (Shimla) and Kothi to help reduce the distance by 19 km. The total length of the tunnels will be 9.5 km. The two longest tunnels will be of 2.27 km each between Taradevi and Shogi and Kandaghat and Solan. The state government wants that the highway be realigned and include more tunnels to reduce the distance by another 20 km. The Himalayan expressway stretch of it was opened in June 2021. Four lane project

In September 2015, Construction works are commenced on the project. On September 27, 2016, tenders were invited for the construction of Solan-Kaithlighat section, with last submission date as November 11, 2016. As of February 2017, the project is facing delay due to legal issues and construction works on the first phase are kept on hold. Earlier the project was put on hold due to legal issues; however the project resumed in June 2017. In August of 2023, several sections of the expressway were damaged by landslides and floods during the 2023 North India floods. Geologists argued that the cutting of the mountains for highway construction had destabilized the slopes. 