There are topics that get the Action 2 News social media audience talking, but few inspire as much ire as roundabouts. Well, get this: Right now there are hundreds of experts in Green Bay from as far away as Germany and Japan attending a three-day conference that's entirely about roundabouts.

“Green Bay's probably the highest concentration of high-capacity roundabouts at interchanges, and that means that we can deal with the trucks, and the pedestrians, and the bicycles and the heavy traffic mass,” said Mark Lenters, ‎Roundabout Practice Leader at Ourston. “And there's not many places in the country where you have that much of a concentration of high capacity roundabouts."

Cities are looking to Green Bay as they try to introduce roundabouts to drivers who may not have experienced them before.

For example, people in the state of Minnesota will soon hear the song and dance the Wisconsin DOT created for Northeast Wisconsinites five years ago. “The jingle, it's really hard to get out of your head,” laughed Mark Kantola of the Wisconsin DOT, singing, “Take it slow, take it slow!”

Roundabouts in the U.S. are much different than those in Europe which have been around for centuries.

“In Europe we mostly use the smaller roundabouts, the single-lane roundabouts, because they are the safest ones,” said Werner Brilon of Ettlingen, Germany. “We do not favor the large roundabouts as they are here in the United States."

This convention is in its fifth year and was held in Carmel, Indiana -- a suburb of Indianapolis -- last year. "It was time for the committee to invite the world to come and see what Green Bay has done. So Carmel... eat your heart out!” laughed Lenters.