rick mosser was killed in june of 2007 by a speeding pickup truck in a work zone. >> it shouldn't take the death or injury of a highway worker. >> reporter: today his width yo was widow spoke. >> every day we have workers that come to their office. this is their office. you can see how close it is to speeding vehicles, to dangerous situations. >> reporter: the system includes large warning signs going into the speed trap and even an electronic display of your speed before you get there. only then will a car mounted camera snap your picture. motorists going 12,000 miles an hour over the speed limit will get violation notices in the mail for a fine of $40. the systems will be placed on i- 95 north through the icc work zone in prince george's county and also major work areas on i- 95 past baltimore. many interstate drivers say this is a speed camera system they can live with. >> people need to slow down. it is a work zone. >> reporter: and rick mosser's widow says it has been a long time coming. >> reporter: this is not just about highway workers, these work zones on average are much more