You can be atheist agnostic - you don’t actively participate in religion or worship but believe it is fundamentally unknowable if there is or is not a god, you can also be theistic agnostic (though this is rare in the modern lexicon) which would be where you do participate in religion (or religious practices) but still believe it to be unanswerable. To be gnostic is to believe it is knowable (and perhaps that one does know), it too can be either theist or atheist in nature.
Any motoring organisation that proposed speed humps should be ignored, as they clearly aren’t competent. Proper road design slows drivers without needing to impede emergency services or add wear to vehicles. Adding bike lanes or planter boxes to the road center brings the desired behavior (slows drivers) with literally no negatives.