"Essentially, rather than encouraging drivers to speed up by presenting an endless succession of green lights, this strategy makes red the default state for lights on a busy road. When traffic approaches the red light, the cycle triggers. Traffic moving faster than the limit will approach the light while it’s still red, forcing it to slow or stop for the light before it changes, while traffic moving at the limit will be met with a perfectly-timed green.

Drive the limit, in other words, and you’re rewarded with a constant rhythm of green lights."

That's why the title makes sense