Recife?s urban trains system carries around 400 thousand passengers a day – it is the third largest railway operator in number of users in Brazil. To ensure a safe journey for passengers, it is imperative to increase the subway security with modern technologies and monitoring equipment. The main challenge was to adapt the technology to the specific conditions such as lighting, people flow and speed of a subway station while not interrupting the transportation service. Therefore, ease of operation, installation and high availability of the system were prerequisites for choosing the surveillance solution.