A railway collision protection and safety system has a vehicle device located on rail vehicles at a work zone, a personal protection unit located with rail workers at the work zone, and a dispatcher processor at a control center. An authority limit within the work zone may be determined by the dispatcher processor, and an authority exceeded signal is sent to the rail vehicle when the rail vehicle is determined to exceed the authority limit.

An aircraft detection system supplements the identification of aircraft with information that is obtained from two or more different detection channels. The system may obtain a first set of identifying information about a particular aircraft or flight via a first detection channel at a first time, may determine that the first set of identifying information lacks commonality with previously received sets of identifying information for other detected aircraft of flights, and may track the particular aircraft or flight based on the first set of identifying information. The system may then obtain a second set of identifying information via a different second detection channel at a second time, may determine commonality between the second set of identifying information and the first set of identifying information, and may update the tracking of the particular aircraft or flight by incorporating or adding identifying information from the second set of identifying information.

Hierarchically verifying tactical equipment (122, 124, 126, 128) associated with a group of communication devices (121, 131) including a lead device (111). One example includes validating radio-beacon-associated tactical equipment (122, 124, 126, 128) of each of a plurality of portable communication devices (121, 131) against a set of tactical equipment requirements (302) for each respective one of the plurality of portable communication devices (121, 131), validating an acquired set of available tactical equipment for the plurality of portable communication devices (121, 131) against a set of group tactical equipment requirements (304), responsive to determining that at least one of the plurality of portable communication devices (121, 131) fails to meet its respective set of tactical equipment requirements (302), determining that the plurality of portable communication devices fails to meet the set of group tactical equipment requirements (304), or both, and generating an alert message (703). The alert message may be transmitted to and displayed at the lead device (111).

A vehicle merging method includes, when receiving a merge request from a first vehicle or determining that the first vehicle enters a merging area, obtaining a merging priority of each vehicle in the merging area, and if determining that there is in the merging area a second vehicle whose merging priority is higher than a merging priority of the first vehicle, determining a first instruction, and sending the first instruction to the first vehicle, where the first instruction is used to control the first vehicle to slow down or to stop such that the second vehicle takes priority to merge, or if determining that there is in the merging area no second vehicle whose merging priority is higher than a merging priority of the first vehicle, determining a second instruction, and sending the second instruction to the first vehicle.

Various embodiments provide systems and method for monitoring individuals.

Various embodiments provide systems and methods for aiding a monitored individual with monitoring compliance.

Various embodiments provide systems and method for maintaining an exclusion zone data set in relation to monitoring individuals where the maintenance involves both a user attached monitor device and a user detached monitor.

An apparatus comprising a processor and a transceiver. The processor may (i) receive messages from a plurality of vehicles and (ii) determine relative coordinates of the vehicles based on the messages. The transceiver may (i) communicate the messages using a first channel in a first range and (ii) communicate short messages using a second channel in a second range. Communicating using the second channel may consume more power than communicating using the first channel. The messages may be sent from the transceiver to a cluster head within the first range. The short messages may communicate less data than the messages. The short messages may be sent directly to a target vehicle outside of the first range to determine an associated cluster head for the target vehicle. The messages may be sent to the target vehicle from the associated cluster head via the cluster head within the first range.

Processing location sensor data to detect location anomalies by defining a multi-cell overlay grid for a defined asset tracking area, determining a current location on the overlay grid for an asset according to location data, determining that a probability of transitioning from a previous location to the current location is below a threshold, registering the current location as an anomaly and updating the last known location of the asset to the current location.

Various embodiments provide systems and method for maintaining an exclusion zone data set in relation to monitoring individuals where the maintenance involves both a user attached monitor device and a user detached monitor.