Ryan,
Most of the documentation for the old Traffic Cop appears to have been taken down.
The old Traffic Cop used many sister campaigns and smartlists: a master cop that listens for different events, gatekeepers for each track, and smartlists and smart campaigns galore.
You get more control but it is very complicated to implement. If you have additional questions, happy to take this offline: http://www.growthfusion.com/contact/