The tunnel, shaped like a horseshoe, spans a total length of 159.75 meters with a width of 12 meters and a height of 8 meters. The construction of this tunnel employed a distinctive technique, featuring inner wall lining made with a combination of lattice girder synapses and steel fiber mesh. To prevent water leakage into the tunnel, geotextile and PVC membrane were installed on its surface. The tunnel’s surface was then meticulously paved and levelled using concrete. The primary concern during the construction of this tunnel was the potential seismic impact that blasting technology might have, posing a threat to nearby structures, including the existing one-way tunnel and surrounding buildings. To address this, a survey of approximately 40 buildings around and atop the tunnel was conducted before commencing the project. The survey revealed that some of these structures were in poor condition. Advanced equipment was utilized to monitor any movement or displacement in the vicinity of the tunnel. In response to public apprehension, the department opted for a technology-free approach, employing various machines for the tunnel excavation. This decision adhered to safety parameters, resulting in the successful completion of the tunnel ahead of schedule. Notably, this marks the first double-lane traffic tunnel constructed in Himachal Pradesh using this methdology, without causing any disturbance in the densely populated area. A key feature of the tunnel is that there was zero movement detected in any building, including the old tunnel, thanks to the careful selection of equipment and construction methods. No damage occurred to any structure during the construction process. The construction of this tunnel has been successfully concluded, showcasing a noteworthy achievement in terms of both safety and efficiency.