I have no idea why the app is required here. Cars & bikes are massive, hot, & mobile objects. They're perfect for a modest-cost IR sensor atop the traffic light to detect them and adjust the lights accordingly. This type of system is commonplace in cities in the UK and works effectively.
Having drivers reach for their phone when they're approaching traffic lights - common pedestrian crossing points - is categorically moronic.
Having drivers reach for their phone when they're approaching traffic lights - common pedestrian crossing points - is categorically moronic.