Witness to street harassment

This street harassment wasn’t directed at me but I was shocked to witness it so here it is:

The other day I was coming out of Yoga at 1pm near Bank and Gladstone. A truck driving East on Gladstone laid on his horn and when I turned to see what I was up I caught the driver whooping and hollering and craning his neck to check out a woman walking west on Gladstone on the other side of the street from me. She didn’t even notice that the honking was directed at her. It just seemed completely inappropriate and potentially dangerous for a full sized delivery truck driver to be honking his horn in the middle of a busy intersection just to harass a woman on the street.