If these guys who use these 300 quid all singing all dancing jobbies, still hit bridges when up.sing them, then they are beyond help and should have their licences snipped in 2 pieces to protect themselves and every [zb] else around them. 
I don’t know how we managed! Why don’t they just open their eyes and read the signs, certainly shouldn’t hold Vocational Licences.
There is no hope.
MickM