Patent ID: 11866078
Assignee: HARSCO TECHNOLOGIES LLC
Field: Transport (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 0:
1. A portable roadway protection system comprising:
a first portable device having a first wireless transceiver
a second portable device configured to be carried by a first rail worker, the second portable device having a second wireless transceiver configured to transmit one or more second signals to the first portable device
a third portable device configured to be carried by a second rail worker, the third portable device having a third wireless transceiver configured to transmit one or more third signals with the first portable device
where:
based on the second and third signals, the first portable device is configured to determine a first distance between the second portable device and the third portable device; and
based on the distance being greater than a threshold distance, the first portable device is configured to transmit an alert signal.