The ability to manage speed limits would be nice. And how about deciding which road has right of way when there's an intersection? Not ever crossroads is a four-way stop or traffic light, some just have stop or yield signs. As to roundabouts, in some areas, traffic on the roundabout has to yield to traffic entering. I know from a traffic standpoint it's not the best, but it DOES exist in the real world, and it would be nice to be able to see it incorporated. Also, how about the option to add lanes to existing street and road sides. Like passing lanes, turning lanes... additional lanes in roundabouts. I'd love to have the ability to make 16 lane freeways, 8 lane avenues. And 3 or 4 lane roundabouts. Also, I'd like to see roundabouts that can connect both avenues AND roads. http://www.th.gov.bc.ca/popular-topics/roundabouts/Roundabout_diagram.gif Notice in that picture that only part of that roundabout has more than one lane I guess you can tell I like to micro manage transportation.