I would model the intersections beforehand, and then create the roads with modeling a section and extruding it along a spline (which you can create on top of your plane mesh as reference), connecting your roads to your intersections should require a simple bridge at that moment.
i dont know much about gun control, but why hoping someone to bring gun and stop the guy not everyone want to bring gun or even smallest blade everywhere or see someone bring it in public.
It is for sure convenience. Toolbag has an Integrated sbsar importer. Blender has an officially from Adobe created sbsar importer but you need to login into Adobes forum/account to download it. Toolbag allows an easy export for showing your 3D scene on webpages/portfolio. If it´s for general portfolio purposes and you just…