On: Removing street signs, lights and arrows increases...

[ergo98]

You have it EXACTLY right. Most Indian roads have exactly this sort of system in place, so it's a pretty good comparison.

http://timesofindia.indiatimes.com/india/India-is-worlds-roa...

Not so great of an example.

The model is like every classic "We turned up the lights and people became more productive. And then we turned down the lights and they became more productive. And then..." It's flawed.

[sp332 → ergo98]

parent is referencing the Hawthorne Effect http://en.wikipedia.org/wiki/Hawthorne_effect