Sharraxaadda

trying to cross 100th street at the 97th avenue north crossing, heading west. I got the walk signal and started crossing the street. I was halfway across and it started flashing, and by the time I reached the next lane the lights had changed and I was only 75% across the street. I am not a senior citizen nor am I homeless, and I walk at a regular pace, so clearly something was amiss with the length of this signal. I have no idea if this is a regular event or not, just thought you should know. Thanks.