RATP Smart Systems to supply ticketing system for Hanoi Metro Line 3, Vietnam January 15, 2020 | Europe Company News RATP Smart Systems has secured a contract to design and supply a ticketing system for Hanoi Metro Line 3. The duration of the contract is three years. Hanoi Metro Line 3 will span 12.5 km (8.5 km el... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password