Australia
https://www.afr.com/business/media-and-marketing/advertising/p2p-transport-to-spend-17m-with-telstra-to-make-taxis-roving-digital-billboards-20180914-h15e8v
Article entitled 'Taxis to roam as travelling digital adverts' by Yolanda Redrup in Australian Financial Review, Tuesday 18 September...