PTC On-Board System Restricted Speed Collision Protection
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Solution Overview
Problem
Conventional train control systems, including Positive Train Control (PTC) systems, fail to provide adequate protection for trains operating at restricted speed by not enforcing the subjective intent of speed regulations, particularly in regards to unmonitored rail obstructions or other vehicles.
Innovation Solution
A computer-implemented method and system that utilizes a combination of existing and new PTC messages to generate and enforce targets for trains operating at restricted speed, involving a Train Location Server that forwards locomotive position reports to trains operating under PTC control, allowing for the identification and management of nearby trains and obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional PTC systems enforce objective speed limits (20 mph), then speed control is improved, but protection against other vehicles and unmonitored obstructions deteriorates
Solution Approach 1:
The system continuously receives feedback about other trains' locations through position reports and generates dynamic targets based on this information. The on-board system processes this feedback to adjust speed control decisions, ensuring protection not only from exceeding 20 mph but also from collisions with other vehicles and obstructions within the restricted speed environment.
Solution Approach 2:
The system introduces an intermediary layer of protection by having the on-board PTC system generate intermediate targets based on received position reports. These targets act as mediators between the objective speed limit enforcement and the need for protection against other vehicles, creating a multi-layered safety mechanism that addresses both speed control and collision prevention.
2Device complexity
If PTC systems only monitor train positions, then system complexity is reduced, but detection of nearby obstacles and trains deteriorates
Solution Approach 1:
The system makes the existing position report mechanism universal by having it serve multiple functions: not only for standard PTC operations but also for generating collision protection targets. The on-board system processes these reports to identify nearby trains and create appropriate targets, allowing a single monitoring mechanism to fulfill both standard control and enhanced safety detection functions.
Solution Approach 2:
The system performs preliminary action by proactively generating targets based on received position reports before potential collision risks materialize. The on-board system processes location information in advance to create protective targets, ensuring that detection and response occur before dangerous situations arise, thereby improving detection capability without requiring complex real-time sensing systems.
Data Source
AI summary
A computer-implemented method for a plurality of trains, at least one of which is operating at a restricted speed, the method including: (a) transmitting, by at least one on-board computer of at least one train to at least one remote server, train location data; (b) requesting, by the at least one on-board computer from the at least one remote server, office polling data; (c) generating at least one poll registration message based at least partially on the office polling data; (d) based at least partially on the office polling data and/or the poll registration message, determining proximity of the at least one train to at least one subdivision; and (e) based at least partially on at least one of the following: train location data, office polling data, the poll registration message, or any combination thereof, transmitting, by the at least one remote server to at least one on-board computer of at least one train, train location data comprising location or position data related to at least one other train. A protection system for a plurality of trains, at least one of which is operating at a restricted speed, is also disclosed.