Method for safely operating a rail traffic system and rail traffic system

A method for safely operating a rail traffic system, the method comprising the following steps:

• collecting first rail traffic information correlating with a state variable of the rail traffic system;
• transmitting second rail traffic information correlating with the state variable of the rail traffic system between at least one of a first rail vehicle and an infrastructure facility or the first rail vehicle and a second rail vehicle;
• determining a comparison result on a basis of the first rail traffic information and the second rail traffic information;
• subjecting at least one of the first rail traffic information or the second rail traffic information to a plausibility check using the comparison result;
• and
• controlling the rail traffic system using a result of the plausibility check.