I was driving down the M4 on Wednesday morning at 5am. All the cones were out and at some places the speed was reduced to 40mph, hardly any traffic and certainly no workmen.
I then got onto the M5 which had electronic signs saying LONG DELAYS between junctions 21 and 22. These signs were shown for a good forty miles or so. I was debating whether to leave the M5 and go cross country but in the end decided to stick with it. Glad I did, went through with no delays whatsoever.
I sometimes get the feeling that there's someone sitting in a control office, switching signs on for a joke.