Useless information

On thursday afternoon, I was traveling back home to Lucan from DCU. Once I got on M50, I saw these big signs (apparently they dispaly uptodate information on traffic) saying,
"Accident ahead, expect delays"

That information was no good to anyone, as it should have mentioned that accident is at/before/ after, some particular junction, so if you can leave M50 before that, do so. Well I got home with no traffic jams and only found out later that accident was near some where Dundrum exit, which is miles away or I should say atleast eight exits away from DCU...