Personally I wouldn't cycle on the N11. but the point is the rules and laws are in place its just the enforcement which is lacking. But its legal to cycle on the N11.
BTW - the N11 isn't a motorway and the off ramps are 80kph. 8 or 10 cyclists aren't going to block an exit for more than 20~30 secs. So unless drivers are not paying attention, and/or left it too late to overtake or speeding, I don't see why they'd need to come to complete stop and be unable to read the road ahead to predict the path of cyclists. What if had been a farm vehicle, would drivers be unable to deal with that?
BTW - the N11 isn't a motorway and the off ramps are 80kph. 8 or 10 cyclists aren't going to block an exit for more than 20~30 secs. So unless drivers are not paying attention, and/or left it too late to overtake or speeding, I don't see why they'd need to come to complete stop and be unable to read the road ahead to predict the path of cyclists. What if had been a farm vehicle, would drivers be unable to deal with that?