SimCity adds a raise/lower tool to make tunnels and bridges in Update 7
SimCity's Update 7 is bringing a pretty handy tool to the game -- something that would've been useful, oh, I don't know, at launch?! With a video posted to their YouTube account, Electronic Arts and Maxis showed off the new raise/lower tool, allowing players to raise roads to create bridges and having roads pass underneath them, or lowering roads into the ground to create tunnels. This should give players better traffic management.
If you're still playing SimCity, then you possess a quality of patience that I'll never know. Good for you. Hopefully your patience is well-rewarded with this tool.