Products for underground construction (UTT)

As of my last update in January 2022, “Underground Transport Tunnels” (UTT) are a proposed solution to ease urban congestion and improve transportation. However, it’s essential to note that the term “UTT” might not be a widely recognized or standardized acronym in the field of underground construction or transportation. Nevertheless, the concept of using underground tunnels for transportation purposes is being explored in various places around the world.