These roadworks will entail “multi-way” traffic lights – which will turn this heavily congested junction into an even more tedious experience. The email from ‘Causeway one’ says that the work will start on either 19 May or 20 May (obviously hedging their bets), so your guess is as good as mine…
My advice to you is to leave the car at home, find a couple of good books, and hunker down for the next few days. But if you have to venture out, you can find more details here.