'study trip' along the A21

Yesterday we had chaotical conditions on the 'outer ring'- motorway. Car drivers have been stucked in the snow and had to spend their night on the road. So I decided to do kind of a 'study trip' and chose the A21 for my way home. The road was opened again for traffic in the afternoon and after nearly 10 km I was stucked in a traffic jam :-(
The way home took me one hour longer.