A system is disclosed comprising a plurality of light emitting devices located along a path of travel, each light emitting device comprising a light emitting source, a sensor, a communication module, and a processor, wherein when a first one of the plurality of light emitting devices is activated, the processor in the first light emitting device is configured to detect one or more physical structures surrounding the first light emitting device, detect one or more other light emitting devices, and based at least in part on the detection of the one or more physical structures and the one or more other light emitting devices, determine a location of the first light emitting device with respect to the path of travel.