According to this press release Autodesk Expands Infrastructure Design and Analysis Portfolio With Acquisition of Sam and AutoTrack Software.
The Sam suite of software is widely used around the world by bridge designers and engineers for load analysis in the design of small to medium span bridges. Sam software helps save time, increase accuracy and improve consistency of data during the analysis phase of bridge design.
The AutoTrack suite of software modules for road, light rail, airport, parking and intersection analysis and design is used for infrastructure planning by architects, designers and engineers. AutoTrack provides features to analyze the movements of steered vehicles, light rail vehicles and aircraft, as well as to design car parking areas and roundabouts while drafting in AutoCAD-based environments including AutoCAD, AutoCAD Civil 3D, and AutoCAD Map 3D.