I was just on that section of road today and there is no actual speed limit signs.  Approaching the roundabout from Enniskillen side the only sign is a warning roundabout ahead.  Even when you get on the dual carriage way there are no signs saying 70.  Coming back the other way from dual carriage way to Enniskillen there are warning signs saying Reduce Speed now, but the rumble strips force you down to about 30-40mph.   Heading for Enniskillen, there was merger signs for the two lanes coming off the roundabout into one lane, but no speed signs.  Feel like tweeting PSNI for comment?  