Construction of a major transport project has entered a challenging phase. Engineers are working on tunnelling under major roads and MRT lines, which is proving to be a complex task. Rock blasting is one of the obstacles they are facing, and they are also having to tunnel at a depth of just one metre beneath the North-South Line.

Further details about the project and the challenges being faced by engineers are available. The project is one of the largest of its kind, and its construction is being carefully managed to overcome the various obstacles.

More information can be found from the source, which provides additional insights into the project's progress and challenges.