The 5,253-meter Shahriston Tunnel is part the Dushanbe-Khujand-Chanak highway rehabilitation project. The tunnel was constructed with help of specialists from China Road and Bridge Corporation (CRBC). A total budget for construction of the Shahriston Tunnel is US$51.7 million.

The Dushanbe-Khujand-Chanak highway rehabilitation project was launched in summer 2006. Chinese company, China Road and Bridge Corporation, won the tender and Beijing in 2006 offered Tajikistan grants and loans to fund the project. A total project cost is estimated at $295.9 million, including $281.1 million provided by the Chinese government in a form of a long-term loan. The loan carries a 20-year period and an interest rate of 2 percent per annum. The remaining some $14.8 million have been provided by the Government of Tajikistan.

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