MicroStation

MicroStation (developed by the massive Bentley Systems conglomerate) is the absolute, fierce, legendary arch-rival to AutoCAD. While AutoCAD heavily dominates the commercial "Land Development" and subdivision market, MicroStation completely and utterly dominates the massive "Heavy Civil" and global Department of Transportation (DOT) infrastructure markets. Its signature feature is its "Terrifying Scalability and Precision." AutoCAD can sometimes crash or slow down if a 3D model gets too massive. MicroStation was explicitly engineered to load, view, and manipulate absolutely massive, multi-gigabyte 3D models of entire cities, highly complex bridge structures, and massive rail networks without dropping a single frame, making it the undisputed king of "Mega-Projects." Because it is so heavily utilized by governments, its "DGN format" is the absolute legal requirement for delivering highway plans in many massive jurisdictions (like the Texas DOT). It is not just a drafting tool; it acts as a massive 3D parametric modeling engine, allowing engineers to embed highly complex, non-graphical engineering data directly into the 3D concrete elements of a bridge.