Use BOTH Lanes? Repairing Worn out Carriageway!

I had to go into York earlier and ended up on the bypass, where a misleading sign caused me some thought. The sign read "Congestion Relief Experiment - for City Centre Use Both Lanes."
Now, I would have though that using just one lane would have been better. But keen to oblige I straddled both lanes with my van. Try as I might, I couldn't keep both lanes fully occupied though, and drivers kept sneaking down the inside, or overtaking me. Clearly they didn't read or understand the sign, as they were intent on using just one lane. I can't see how it helps relieve congestion myself. I mean if you did use just one lane, then other traffic could use the other and then you'd get twice as much traffic into the City so much quicker. Maybe that is the point. By asking us to straddle both lanes, the volume of traffic entering the city is halved, so congestion within the City Centre is reduced. And maybe the people in the queue get fed up of waiting and go home instead.
In an attempt to follow the directions on the sign I started weaving between the two lanes - this had the effect not only of reducing congestion, but also of slowing the traffic down, as no-one could overtake me any more. A sort of mobile traffic calming scheme, although after a while I did start to feel seasick. And then I attracted the attention of a nice young man in a Volvo with a fancy paint job. And Disco lights.
He explained to me, after the breathalyser test that the sign actually meant I could use EITHER lane, not both. I can only assume that the sign maker had run out of E, I and R but had BO in abundance. Either (or is that Both) that or he had no grasp of basic English. Funny the difference a word can make.

Another Road Sign I liked in the roadworks was one that said "Repairing worn out carriageway." Nothing like laying the guilt back on the motorist is there? We've worn it out, so they've had to come out and mend it. Isn't that what we pay you to do? Don't lay the guilt back on us. And if you are going to give explanations for the roadworks then let's see some real honesty. "Repairing shoddy workmanship." perhaps, or "Removing substandard materials and replacing them with the stuff we should have used in the first place."

I also like the sign that reads "Lane closed for the safety of workforce" and it's cousin, "Speed limit for workforce safety" These are placed in the miles of cones which precede any actual roadworks, and the irony is the workforce they refer to is NEVER EVER present. In fact the only thing they protect is the lanes of parked vehicles and equipment which is not in use. The honest version of the sign would actually read "Lane closed for parking of workforce vehicles." Why can't they park their cars at the services or in a lay by and then walk or be bussed to the works area? They don't all need their private cars there surely?

For this reason Sign writers and Road workers are now consigned to Room 101.