The study was very flawed. The 85 percentile walking speed for pedestrians (1.2 m&#x2F;s) is for when people start the crossing at the end of green man. So some 15 percent of the people are slower. However if youo take into account most people start crossing before the end of the green man, then the time is ample. &quot;the sensor-controlled systems&quot; - are hopelessly inefficient and actually confusing for pedestrians.<p>A countdown which displays the time until the red-man is best for a balance of all users.