Traffic signal problems at the intersection of Iowa Street and Bob Billings Parkway were causing havoc with traffic Sunday.

“It’s a zoo out there,” John Hoopes, of Lawrence, said when he called the Journal-World about the traffic mess. He said the lights were blinking red when he drove through.

Lawrence police dispatchers said signal problems had been reported “off and on” during the day and that signal workers were called out when those reports were received. Some traffic accidents also had been reported.