Paul Watter, from the AA, told ITV News that bottlenecks on motorways can be incredibly dangerous, because they spill back on to the carriageway. He said that it was understandable for work to be carried out to reduce congestion, but it would come with difficulty for the local area.
More top news
There'll be bracing winds and heavy showers this afternoon, but expect things to become milder heading into the evening.
Carl Edwards and guests look back at the week's events in the latest edition of Newsweek Wales.
A Yellow Warning has been issued by the Met Office as gale force winds and showery rain affect areas across Wales.