I've said it before, but I'll say it again, the A30 is not suitable for cycling.
It may be perfectly legal, but in most other northern European countries it would be called a motorway, Autobahn or Autostrada and cycling would never even be contenplated on such a route.
The story below is tragic, but unless you are some sort of supervised mass race style event, they were in the wrong place.
http://www.bbc.co.uk/news/uk-england-cornwall-23157100
It may be perfectly legal, but in most other northern European countries it would be called a motorway, Autobahn or Autostrada and cycling would never even be contenplated on such a route.
The story below is tragic, but unless you are some sort of supervised mass race style event, they were in the wrong place.
http://www.bbc.co.uk/news/uk-england-cornwall-23157100