COULD ANYONE TELL US?

Could anyone tell us what the purpose of agents who are on duty at street intersections is, since they do not force drivers to make the regulatory warnings?

Could someone tell us if it is absolutely necessary, in the Metro, to jostle everyone under the pretext of going faster?

Could someone tell us if there is a special reason for sweeping only one stream, when the streets usually have two?

Could someone tell us why rue Réaumur stands out for anything other than careful cleaning?