Part of the National Highway Development Phase III, this project involves the conversion of the existing two-lane highway to four lanes. The project stretches from Solan (106+000km) to Shimla (156+507km) of NH-22 section in the state of Himachal Pradesh and falls on a mountainous terrain.

Under the road development program, the existing ROW (right-of-ways) measuring 12 to 24 metres will be widened to 45 metres.  There will be new tunnels at four locations, 14 bus bays, a toll plaza and two trucks lay-bye.  Presently, there are 185 culverts and this will be eventually increased to 240 with additional 22 bridges. Two bypasses have also been proposed at the major habitations of Kandaghat and Shogi-Shimla-Dhalli.

As the UNESCO World Heritage railway line runs very close to the project road, cautious planning and considerations were taken to the widening of the existing roads to four lanes. A major bridge of 600 metres has been proposed in order to avoid the road alignment to bypass the forest reserves. To increase the road efficiency, four tunnels measuring 460 to 1230 metres has also been proposed in the preliminary design.

Meinhardt has also undertaken the geotechnical investigations, environmental & social impact assessment, traffic studies, public consultation and cost estimates among others under the contract.