Traffic control system and traffic control method

A traffic control system comprising:

• a mobile body;
• an infrastructure sensor that monitors the mobile body and a pedestrian within a field, including monitoring the pedestrian in a blind spot of the mobile body;
• and
• a safety monitoring device that communicates wirelessly with the mobile body,
• the safety monitoring device including
• a rule violation detection unit that detects, on a basis of output from the infrastructure sensor, a rule violation by the mobile body or the pedestrian within the field, the rule violation being determined based on public traffic regulations and custom traffic rules on a private property, and
• a safe action instruction unit that issues an instruction to the mobile body to execute a safe action or safe action preparation corresponding to the rule violation when the rule violation is detected, based on a determination of whether a difference between a time stamp, received by the safety monitoring device from the mobile body as part of a measurement packet, and a current time is less than a time threshold defined for a deadline by which a collision is avoidable if the safe action is executed after the rule violation is detected,
• wherein, regardless of the instruction from the safety monitoring device, the mobile body is configured to decelerate based on a wireless communication speed of the mobile body with the safety monitoring device being greater than or equal to a prescribed threshold,
• wherein the rule violation detection unit, when predicting that another mobile body or the pedestrian exists around the mobile body, detects a violation of work prohibition when a person is close, and the safe action instruction unit issues the instruction to the mobile body to perform a safe stop based on the prediction.