It is not always about insulating bicycles from other vehicles. When forced to interact with bikes more often, car drivers drive more safely and conservatively. Not sure that works everywhere or depends on better driver education and general empathy.

https://time.com/archive/6683576/signal-failure/

https://bikecity.amsterdam.nl/en/experiment-traffic-lights-d...

http://dutchcycling.nl/get-inspired/sarphatistraat-amsterdam...