MADISON, Wis. (AP) – Local communities, not just state transportation officials, would have to approve roundabouts before they could be constructed, under a bill introduced in the Wisconsin Assembly.  The measure affecting the circular intersections was introduced Wednesday by state Rep. David Craig, a Republican from the town of Vernon.   Installing roundabouts instead of traditional intersections with traffic signals has increased in popularity across Wisconsin in recent years. Under current law, the state Department of Transportation can proceed with building a roundabout even when there is local opposition.  Craig’s bill would also require local approval. Craig says that will ensure those who will be using the roundabouts have a say in the process.  The measure has 22 co-sponsors, including one Democrat in the Senate.