A cron job might could work as a solution. Perhaps not initially but I could see it getting there. Example scenario: Vehicle drives through a toll gantry. Toll operator captures license plate info or some other means to identify it like a toll tag (i.e. transponder). Operator issues a lightning invoice to account owner of the transponder or license plate to pay said toll. Invoice paid via lightning (automated or one-click approval maybe) by the user/customer. Make sense?