Electronic Train Management System and Safety

Larry Milhon

March 9, 2007

1

Derailment Prevention

Small Team of Technical People (15)

Derailment Investigation / Training

Technical Consulting

Simulation - Stopping Distance Analysis

Safety Analysis

Technical Research & Development

2

Web Based Training

Derailment Prevention

Schedule Derailment Training Classes

Review Procedures

Safety

Scene Management

Photographs Needed

Investigation Process

Measurements Required by Various Disciplines

Glossary

3

Derailment Prevention

Risk Analysis

Sign als

Speed Violat ion

Tr ain Han dlin g/ M ake- UpFr ogs/ Swit ches

Br ake Def .

LocoDefCar Door

Car BodyRoadbed

Coupler / Dr af t

T r uck Compon en tLoadin g Pr ocs. M isc Ot her

Un usual Ops

Use Of Br akes

Use of Swit ches

Hwy- Xin g

Ot her Way

Ops Ot her

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

0 10 20 30 40 50 60 70 80 90 100

A v g . D e r a i l me n t F r e q u e n c y i n 5 Y e a r s

Main Track Authority

Environmental Flag / Signal

Axle / Journal

Wheel Defects

Rail / Joint Bar Defects

Track Geometry

General Switching Rules

Average $ in Derailments

By Cause Group

4

ETMS and Safety

• Electronic Train Management System

Primary purpose is to keep trains from colliding

Another important feature is to prevent trains from entering work zones without permission

Also prevents trains from over-speeding

Video

ETMS Basics

5

ETMS and Safety

• Previous Efforts – BNSF Involvement

ARES – Advanced Railroad Electronic System

PTS – Positive Train Separation

NAJPTC – North American Joint Positive Train Control

ETMS Background

6

ETMS and Safety

FRA Approval Process

• Federal Regulation Developed using RSAC

49 CFR Parts 209, 234, and 236 subpart H

First step is to develop an Railroad Safety Program Plan - RSPP

Product Safety Plan - PSP

System Description and Operation Plans

Training / Maintenance Plans

Safety Analysis

7

ETMS and Safety

RSPP

• Railroad Safety Program Plan

Design Specification Document for All Processor Based Signal and Train Control Systems

Describes Railroad Safety Concepts and Philosophy

What Standards Were Used

Describes Railroad’s Safety Critical Development Plans

RSPP Lays Out the Architecture of the PSP

8

ETMS and Safety

RSPP Severity

I. Catastrophic

II. Critical

III. Marginal

IV. Negligible

Probability

A. Frequent

B. Probable

C. Occasional

D. Remote

E. Improbable

9

Derailment Prevention

Risk Analysis

Sign als

Speed Violat ion

Tr ain Han dlin g/ M ake- UpFr ogs/ Swit ches

Br ake Def .

LocoDefCar Door

Car BodyRoadbed

Coupler / Dr af t

T r uck Compon en tLoadin g Pr ocs. M isc Ot her

Un usual Ops

Use Of Br akes

Use of Swit ches

Hwy- Xin g

Ot her Way

Ops Ot her

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

0 10 20 30 40 50 60 70 80 90 100

A v g . D e r a i l me n t F r e q u e n c y i n 5 Y e a r s

Main Track Authority

Environmental Flag / Signal

Axle / Journal

Wheel Defects

Rail / Joint Bar Defects

Track Geometry

General Switching Rules

Average $ in Derailments

By Cause Group

10

ETMS and Safety

PSP

• Product Safety Plan

Detailed Description of the Proposed System

Description of Railroad Operations using this System

Description of Sub-systems

Description of the Safety Aspects of System

System Architecture

Hazard Log

11

ETMS and Safety

PSP

• Product Safety Plan (cont.)

Comparison of Risk – Existing to Proposed MTTHE

Description of Methodologies Used for Safety Analysis

Preliminary Hazard Analysis – PHA

Functional Fault Tree - FFT

Sub-System Hazard Analysis – SSHA

Verification / Validation Processes

Human Factors Analysis

12

ETMS and Safety

PSP

• Product Safety Plan (cont.)

Training of Operators and Maintainers

System Operations and Maintenance Manual

Test Procedures

Post Implementation Monitoring

13

ETMS and Safety

ETMS Onboard Screenshot - ConOps

14

ETMS and Safety

ETMS Safety Analysis - PHA

15

ETMS and Safety

ETMS Safety Analysis - PHA

16

ETMS and Safety

ETMS Safety Analysis – Functional Fault Tree

17

ETMS and Safety

ETMS Safety Analysis – Functional Fault Tree

18

ETMS and Safety

ETMS Safety Analysis – Functional Fault Tree

19

ETMS and Safety

ETMS Safety Analysis - Comparison

20

ETMS and Safety

ETMS Safety Analysis - Reliance

1. Improper Use of ETMS Information

2. Improper Use of ETMS Functions

Training of Operators

Operations Testing

Post Implementation Monitoring

21

ETMS and Safety

Prevents Train-to-Train

Collisions

Prevents Work Zone Incursions

Prevents Overspeed Derailments

Provides Platform for Future Development

Derailment Prevention Through Technology

ETMS Improves Safety