Do bicyclists and pedestrians really require the use of sensors? There are a lot of paths around me that cross busy roads with traffic signals. We just press a button. It speaks after you press it for visually impaired users and shows a red light after you press it for audibly impaired users.
Do pedestrians need automatic detection? Not necessarily, although a beg button adds unnecessary friction.
Do cyclists need automatic detection? Yes, absolutely. If you think otherwise, would you want to park and exit your car every time you want to cross an intersection? It's no different for a cyclist.
