System and method for virtual approach signal restriction upgrade
US12311988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2023 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Nov 20, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L27/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and method for providing a virtual approach signal restriction upgrade between physical signaling components is presented. In one embodiment, in a CTC type of operation, the use of a virtual signal with signal type functionality to split a block into two or more sections can allow a train currently governed by an approach indication to accelerate on a clear indication if the advance signal indication upgrades. The addition of audio frequency type circuits with the advance signal indication can allow a train to upgrade from a restricting indication to an approach or clear indication, while protecting open HT switches, broken rail, hazards, and follow up moves. The present invention provides a system for allowing trains to upgrade from a “restricting” indication to an “approach” or “clear and accelerate” indication with an upgraded PTC track line for the segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.