Atal Setu Bridge is located at Rangpo, Pakyong district, Sikkim. It is the longest roadway bridge of Sikkim. It was inaugurated by Honourable President of India Smt. Droupadi Murmu on 4 November 2022. It is constructed by National Highways and Infrastructure Development Corporation Limited (NHIDCL). The 1,123 m long bridge over River Rangpo lies on National Highway 10 and connects Pakyong District of Sikkim with Kalimpong district of West Bengal. The construction was started on 20 Nov 2017; the completion was slated on 20 Feb 2020 but due to certain circumstances and Covid pandemic, construction work took a little more time.

This bridge is also known as Rangpo IBM bridge.^{[1] [2][3][4]} This bridge constructed on Viaduct Engineering concept has 18 modules (slabs) glued to one another from either side making it tensile enough to face 8 to 9 Richter Scale Earthquake because Sikkim lies in seismic zone 5. The bridge has two lanes - one in either direction - and has footpath on both sides. The cost of the project was Rs.56 Crore approximately.^[5]