Official "portable" versions of (the kind that runs from a USB without installation) do not exist from Autodesk . Using third-party portable versions is often illegal and highly risky due to potential malware and system instability.
A roadway project team prepares deliverables for field crews: they export corridor surfaces as tiled LandXML with accompanying CSV stakeout points, generate 3D meshes (OBJ) for tablet visualization, and produce annotated PDFs for plans; field crews use a mobile CAD viewer and GNSS tools to verify stake positions and record as-built CSVs returned to designers. software portable autocad civil 3d work