About 8am this morning between junctions 16 and 17 heading towards bristol i noticed a police car parked up on a slope on the side of the road. To the side was a big sign saying "Traffic Police only or simular"
The road was dead and i was doing around 85 - 88 indicated MPH untill i saw it from maybe 100 meters then slowed all the way down.
This was completely safe as it was easter sunday and only a few cars on the M4.
Is this just a normal police car looking for people to pull over, or do they run speed checks on all cars passing?
Just want to put my mind at rest really!
The road was dead and i was doing around 85 - 88 indicated MPH untill i saw it from maybe 100 meters then slowed all the way down.
This was completely safe as it was easter sunday and only a few cars on the M4.
Is this just a normal police car looking for people to pull over, or do they run speed checks on all cars passing?
Just want to put my mind at rest really!
However after this experience maybe keep the speed a little lower to give you less panics or scares. 
