I'm with FMRL on this one - the amount of times a lorry has been able to let me out (c'mon, where's the common courtesy here?!?) but has decided to be an obstinate *******, is unbelievable. Limited to 56mph, yes, but since when has speed necessarily had any link to your ability as a driver or your character?
The lines on the end of a slip way may mean give way, but it'd be stupidly dangerous to stop on the line!
Not wishing to tar all lorry drivers with the same brush, but some of them are just ****s. You can't tell me that they don't let you out, don't speed up to prevent you from getting out etc because their lorries are limited.