i'm on the highway to hell >>> well, there may have been no speed limits on the highway to hell for ac/dcs, they're getting a hard lesson about speed traps. >> critics say they're more about raising revenue and lining the pockets of police officers. here's abc's steve osunsami. >> reporter: we know. sometimes it can be so unfair. you are driving on summer vacation. and the speed limit drops for a very short stretch. and waiting under the sign is a friendly police officer, writing tickets like there's no tomorrow. meet curt, a retired area cop. he says cities and counties make big money from speed traps. and it's like shooting fish in a barrel. >> it's like dirty secrets. >> reporter: across the country, tourists and other drivers are fighting back. reporting more than 82,000 speed traps since 2000, to the national speed trap exchange, warning other families on the roads. houston ranks number one, with nearly 500 reported since 2000. but the police lights are flashing all across the country. along i-71, in lynn dale, ohio, the speed drops to 60 for about 14 seconds on the highway. and befo