> How do you know how people are using your services if nobody is scanning tickets any more?
The light tram I use often (https://www.vltrio.com.br/) has a sensor above each door which counts how many passengers get in and out of the vehicle at each stop (the payment is done within the vehicle through NFC card readers near each door; the count from the door sensors allows estimating the amount of fare evasion). So these kinds of sensor do exist, and don't need facial recognition to do their job (this particular one wouldn't be able to do facial recognition even if it wanted to, due to its placement looking straight down).
(The presence of these sensors on that particular tram line isn't well known, so it's a bit hard to find more information; a quick web search found https://www.semanadetecnologia.com.br/25semana/wp-content/up... which has on its page 4 some sample images from these sensors, plus photos of the NFC readers).
The light tram I use often (https://www.vltrio.com.br/) has a sensor above each door which counts how many passengers get in and out of the vehicle at each stop (the payment is done within the vehicle through NFC card readers near each door; the count from the door sensors allows estimating the amount of fare evasion). So these kinds of sensor do exist, and don't need facial recognition to do their job (this particular one wouldn't be able to do facial recognition even if it wanted to, due to its placement looking straight down).
(The presence of these sensors on that particular tram line isn't well known, so it's a bit hard to find more information; a quick web search found https://www.semanadetecnologia.com.br/25semana/wp-content/up... which has on its page 4 some sample images from these sensors, plus photos of the NFC readers).