WTVO/WQRF - Signs have been warning drivers to slow down and most of us appear to be taking notice.
IDOT was trying out speed indicators to let drivers know just how fast they were going. State leaders say they've noticed more are slowing down. Now, they'll be mandatory at every road construction zone with lane closures and workers present.
IDOT will use those signs on interstates and expressways.
Copyright 2017 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.