Jantra
http://wales.gov.uk/docs/det/publications/140627-eastern-bay-link-image.pdf
It would be pointless completing the "ski-jump" for the road to have another roundabout in a 100yds!
Better they got on with the whole thing.
Here is the complete list of WAG road upgrades, looks impressive, except most start with the words like; We're planning, thinking about, proposed scheme, talking to, considering, .....
http://wales.gov.uk/topics/transport/roads/schemes/m4-road/?lang=en
PS was anyone else amazed that this key road was closed for 24hours in December for "My Big Fat Gypsy Funeral" ?