Many people have difficulty with street crossings, this could be because the green man does not give you enough time, the beep does not work or the push button is not in the right place.
If you watch this video you will see how quickly the green man changes back to red and how quickly the traffic light changes back to green for the traffic.
Position of the push buttons
Can you spot the button to cross this road?
In the picture below Bob cannot reach the push button because the pavement slopes away and there is not enough room on the flat surface for him to get close enough to press the button.