Some intersections I cross in Chicago have the walking man for literally one to two seconds before it starts the blinking hand or countdown (typically in the 10

Some intersections I cross in Chicago have the walking man for literally one to two seconds before it starts the blinking hand or countdown (typically in the 10-15 sec range). This is barely enough time to enter the intersection, even if the individual is paying complete attention. Given this, I'd never even considered that it could be a fineable offense to begin crossing when the countdown was happening.