(Radio Iowa) – You might be seeing more of those radar speed signs when the construction season ramps up again in the spring. The D-O-T’s Dave Lorenzen, says the signs already in use in some construction zones show how fast you are going. “They are effective — in fact, we are hearing more from people driving in work zones that that is probably one the most effective tools to bring their attention to the fact that they are going too fast, they are going past the posted limit,” Lorenzen says. He says people usually slow down when their speed is displayed. “I’ve heard them referred to in some law enforcement circles as shaming boards, because all of a sudden you look down and it’s like ‘Oh my gosh I am going that fast’,” he says.

Lorenzen says they are looking to use more of them. “We are in the process of securing additional units — and you will see those more readily deployed on mobile maintenance and construction sites that we are involved in,” Lorenzen says. He says it makes sense to use more of them. “We do know they are effective, they are not overly expensive,” according to Lorenzen.

Lorenzon says one thing the signs don’t do is take a picture and send you a ticket. He says their purpose is to remind you of your speed and the need to slow down in work zones.