ASCE Standard 21-05 AUTOMATED People Mover Standards- Part 1 Operating environment, safety requirements, system dependability, Automatic Train Control (ATC) Audio and visual communications, Systems and safety program requirements

CONTENTS

Foreword vii

Acknowledgments ix

1.0 GENERAL 1

1.1 Scope 1

1.2 Existing Applications 1

1.3 New Applications 1

1.4 Reference Standards 1

1.5 Definitions 2

2.0 OPERATING ENVIRONMENT 3

2.1 Ambient Conditions 3

2.1.1 Temperature and Humidity 3

2.1.2 Wind 3

2.1.3 Precipitation 3

2.1.4 Lightning 4

2.1.5 Existing Atmospheric Pollution 4

2.1.6 Solar Heat Load 4

2.1.7 Flood Zones 4

2.1.8 Electromagnetic Background 4

2.2 Induced Environmental Parameters 4

2.2.1 Exterior Airborne Noise 4

2.2.2 Structure-Borne Noise/Vibration 4

2.2.3 Electromagnetic Radiation 4

3.0 SAFETY REQUIREMENTS 5

3.1 System Safety Program 5

3.1.1 System Safety Program Plan 5

3.1.2 Hazard Resolution Process 5

3.2 Safety Principles 6

3.3 Automatic Train Control System Fail-Safe Design 6

3.3.1 Intrinsic Fail-Safe Design 6

3.3.2 Alternatives to Intrinsic Fail-Safe Design 6

3.4 Verification and Validation 8

4.0 SYSTEM DEPENDABILITY 8

4.1 Service Reliability 9

4.1.1 Service Interruptions 9

4.1.2 Exceptions 9

4.2 Service Maintainability 9

4.3 Service Availability 10

5.0 AUTOMATIC TRAIN CONTROL 10

5.1 Automatic Train Protection Functions 10

5.1.1 Presence Detection 10

5.1.2 Separation Assurance 10

5.1.3 Unintentional Motion Detection 11

5.1.4 Overspeed Protection 11

5.1.5 Overtravel Protection 11

5.1.6 Parted Consist Protection 11

5.1.7 Lost Signal Protection 11

5.1.8 Zero Speed Detection 11

5.1.9 Unscheduled Door Opening Protection 11

5.1.10 Door Control Protection Interlocks 12

5.1.11 Departure Interlocks 12

5.1.12 Direction Reversal Interlocks 12

5.1.13 Propulsion and Braking Interlocks 12

5.1.14 Guideway Switch Interlocks 12

5.2 Automatic Train Operation Functions 13

5.2.1 Motion Control 13

5.2.2 Programmed Station Stop 13

5.2.3 Door and Dwell-Time Control 13

5.3 Automatic Train Supervision Functions 13

5.3.1 Constraints on Automatic Train Supervision 13

5.3.2 Status and Performance Monitoring 14

5.3.3 Performance Control and Override 14

5.4 Manual Operation Limitations 16

6.0 AUDIO AND VISUAL COMMUNICATIONS 16

6.1 Audio Communication 16

6.1.1 Station Public Address 16

6.1.2 Emergency Station and Wayside Communications 16

6.1.3 Train Voice Communications and Public Address 16

6.1.4 Operations and Maintenance Personnel Communications 17

6.1.5 Recording of Audio Transmissions 17

6.1.6 Intelligibility of Audio Communications 17

6.2 Video Surveillance 17

6.2.1 Central Control Equipment 17

6.2.2 Passenger Station Equipment 18

6.2.3 Recording of Video Transmissions 18

6.3 Passenger Information Devices 18

6.3.1 Vehicle 18

6.3.2 Stations 18

ANNEX A SYSTEM SAFETY PROGRAM REQUIREMENTS 19

A.1 System Safety Program Plan 19

A.2 Preliminary Hazard Analysis 20

A.3 Subsystem Hazard Analysis 21

A.4 System Hazard Analysis 22

A.5 Operating and Support Hazard Analysis 22

ANNEX B BIBLIOGRAPHY 25

INDEX 27