Hanoi held a breaking ground ceremony on October 6 for a tunnel at the intersection of Ring Road No. 2.5 and Giai Phong Street in Hoang Mai district. With a length of 400 meters and total investment of nearly VND800 billion ($33.5 million), the tunnel is a key project for the city in the 2021-2025 period and will contribute to the completion of the capital’s transport infrastructure.