I don't generally use dual carriageways, but I will if the alternative is a long diversion and time or energy is short, and then there are also occasions when the navigation goes awry and I end up where I didn't intend to. The Stansted Airport junction on the M11 is an entertaining ride, at nearly half a mile round the loop. You could be forgiven for thinking that
this is not a roundabout, but the left turn is the airport exit, straight ahead is the circuit of the roundabout, and the right turn is a three lane shortcut through the middle of the island.
Cycling from Bangor to Chester via the coast and Dee estuary, I got as far as Connah's Quay and then found myself heading over the new Dee bridge by mistake because it wasn't marked on my old map. After I realised, I kept going as far as the crest of the bridge, but when I got there the new road appeared to be heading out across the Wirral towards Birkenhead, so I decided I didn't have time or energy for a wild goose chase, and turned back. That was fine on the walkway as far as the end of the bridge, but then
I was cycling in the concrete rain gutter, so I stood in the fast lane lifting a fully laden touring bike over the Armco to get onto the right carriageway.
Like this you mean?
View attachment 716134
The same applies to asking for directions, I quickly learnt
never to ask the way unless you want to be sent down the dual carriageway that all the motorists use.