more traffic cops = more traffic?

Why is it that when there are traffic cops, the traffic seems to be worse?

I recall a story where an Emperor had all the doctors killed because he found out that the regions where doctors were aplenty were the same regions where there were more sick people.

There's a bit of chicken and egg thing with the traffic, I suppose. It's easy to get things backward.

However, I did see a situation yesterday where it seemed that traffic cops caused more a problem for the smooth flow of traffic, or rather the lack thereof.

Hopefully, this is the exception and not the rule.

On Edsa, they MMDA guys lined the yellow bus-only lane about 500 meters apart. I suppose they were making sure no private cars snuck in. The result: A rigid bottle neck and snail pace traffic.

Happily, they adjusted their game plan today. Instead of keeping private cars from sneaking in they, were directing them INTO the yellow bus-only lane to make good use of what would otherwise just be empty lanes.

Good job guys.