A bus validator system is a device that is used to collect fares on public buses. It is typically a handheld device that is mounted on the bus, and it can be used to scan smart cards, barcodes, or QR codes. The validator system then records the fare payment and updates the passenger’s account.

Bus validator systems are used to improve the efficiency of public transportation. They can help to reduce the time it takes to board and disembark from buses, and they can also help to prevent fare evasion. Additionally, bus validator systems can be used to collect data about passenger travel patterns, which can be used to improve the public transportation system.