[fian]

Some pedestrian crossing buttons play different audible beats so blind people know when they can cross. Famously the beat of one in Sydney was sampled for a Billie Eilish song (https://www.youtube.com/watch?v=I-zeJRjP6xA skip to around 4:00 mins).

However others have no indicator or sound. To make things even more confusing is the pedestrian crossings can also be programmed to happen automatically at peak times with no button press, but absolutely need a button press outside of peak hour.