Saw this article online and thought I would share. These presumably are the same cameras I posted about some time ago that are lidar based and difficult to detect. Hopefully the defender database will be updated as these units are deployed. Here's a link to the article. Maybe LI's might protect. The units are mobile so the position of the units are sometimes changed.
Prince George's Introducing School Speed Cams - Local News - Washington, DC - Washington D.C. - msnbc.com