> The etc. could include hyper-local ads, making the system self funding. Yikes. Why do public goods always need to have ads to be self-sufficient? > This can

> The etc. could include hyper-local ads, making the system self funding. Yikes. Why do public goods always need to have ads to be self-sufficient? > This can be far cheaper than tactile pavement and so more widely deployed […]. The cost of deploying low power transmitters, developing and certifying new systems (not everyone carry a smartphone) or mobile apps to receive the signal, educating impaired people across the world to use them, then regularly maintaining the electronics across a city will hardly be cheaper than passive tactile paving.