And heat is not ready a concern. You can touch most LED bulbs with your bare hands with no risk of severe burn.
This very clearly indicates that you haven't seriously considered this issue at all, and are just supporting your political faction with no reflection on what the unintended consequences might be.
A common application of incandescent bulbs is to produce heat, for a variety of use cases. The typical example is an improvised chicken incubator.
Consider very carefully why there's an exception for traffic signals.