Major roadworks still on the Almondsbury interchange but if you hit them outside the rush hour they are fine.
Agree with Hacksaw Bob, Traffic England is a great place to go to check roads before you leave and whilst on the move (as long as you have a passenger and a device that can access the internet). If your phone uses Google Maps on its Satnav that also gives real time traffic updates too.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.