Devices and methods for synchronized signaling of the positions of moving pedestrians or vehicles

A system comprising a plurality of wearable signal emitting devices wherein each devices comprises:

• a wearable article comprising a wearable garment, vest, shoe, running shoe, headgear, cap, hat, helmet, hard hat, strap, leg strap, arm strap, belt, back-pack lanyard, jewelry, ear ring, necklace or wrist band;
• and
• a position indicating device attached to or integrated in the wearable article;
• wherein the position indicating device comprises at least one emitter which emits a position indicating signal:
• a receiver;
• a power source;
• and electronic circuitry;
• and
• wherein input signal(s) are received via the receiver and the electronic circuitry causes the position-indicating signals emitted by the emitter to change in response to the receipt of one or more input signal(s);
• and
• wherein each device is configured to transmit a synchronization signal to other devices located within a synchronization range of that device;
• wherein the electronic circuitry of each device uses received synchronization signals to cause its signal emitter to emit position indicating signals which are synchronized with those emitted by others of said devices located within said synchronization range;
• and
• wherein each device also comprises:
• an antenna configured to receive and transmit a radio frequency (RF) signal or photodetectors and transmitters to provide visible or infrared light modulated communication, computer hardware comprising a microcontroller configured to perform instruction stored in memory, a RF transceiver or photodetectors configured to transmit and receive messages from the microcontroller, and a power source;
• and
• memory comprising a neighbor table including a timing indicator of neighbor modules, the timing indicator indicating a latency before emitting the warning signal with respect to a network-coordinated clock;
• wherein the computer hardware is configured to share timing and a relative position data to at least modules in its neighbor table, the relative position at least in part based on the proximity indicator, the timing and relative position data used to synchronize simultaneous emission of the warning signal with at least the modules in its neighbor table.