solan kumarhatti tunnel in himachal pradesh india is an engineering marvel.

965-metre one-way tunnel barog bypass likely to be made functional year-end as work connect highway near kumarhatti undertaken lone 39-km stretch parwanoo-solan which was being fourlaned september 2015 would reduce distance shimla chandigarh 35 km solan himachal pradesh india engineering marvel marvelthe wonder mountains road trip travel journey