About two dozen Peoria City leaders and residents took a bit of field trip Wednesday. The goal was to see a city where Roundabouts are already in action. The destination was Carmel Indiana: a town of about 82,000 people and 80 roundabouts. It’s known as the nation’s capital for the circular-type of intersection. That’s in contrast to where the idea stands in Peoria. The concept of roundabouts has caused something of a stir. There are five such interchanges either under construction, planned or being considered in Peoria and one nearly open in East Peoria’s new downtown.  Peoria Public Radio’s Alex Rusciano got on the bus yesterday, headed to Carmel Indiana and filed this report: