Terminal device, roadside device, communications system, and communications method

A terminal device includes: a pedestrian-to-vehicle communication device configured to communicate with an in-vehicle terminal by using a first communication method, in which direct communication is performed as pedestrian-to-vehicle communication; a wireless LAN communication device configured to communicate with the in-vehicle terminal by using a second communication method, in which indirect communication is performed via a roadside device disposed on or near a road; and a controller configured to determine whether or not the terminal device is in a risky state based on state information indicating a state of the terminal device, and select either one of the first communication method, in which direct communication is used and the second communication method, in which indirect communication is used, based on a result of the determination.