AS 4191-1994

1 - AS 4191:1994 PORTABLE TRAFFIC SIGNAL SYSTEMS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 - SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 REFERENCED DOCUMENTS
8 - 1.3 DEFINITIONS
8 - 1.3.1 Actuation
8 - 1.3.2 All-red interval
8 - 1.3.3 Aspect
8 - 1.3.4 Controller
8 - 1.3.5 Cycle time
8 - 1.3.6 Demand
8 - 1.3.7 Fixed-time mode
8 - 1.3.8 Green extension
8 - 1.3.9 Manually operated mode
8 - 1.3.10 Master controller
8 - 1.3.11 Maximum green time
8 - 1.3.12 Minimum green time
8 - 1.3.13 Passage detector
8 - 1.3.14 Phase
8 - 1.3.15 Plant-crossing control
8 - 1.3.16 Portable traffic signal system
8 - 1.3.17 Presence detector
8 - 1.3.18 Presence time
8 - 1.3.19 Shuttle control
8 - 1.3.20 Slave controller
9 - 1.3.21 Traffic signal lantern
9 - 1.3.22 Vehicle-actuated mode
9 - 1.3.23 Vehicle detector
9 - 1.4 RADIO POWER AND FREQUENCY LICENSING REQUIREMENTS
9 - 1.5 TRAILER-MOUNTED SYSTEMS
9 - 1.6 SURFACE FINISHES
9 - 1.7 INSTRUCTION MANUAL
9 - 1.8 MARKING
11 - SECTION 2 - OPERATIONAL REQUIREMENTS
11 - 2.1 CONTROL TYPES
11 - 2.2 MODES OF OPERATION
11 - 2.3 START-UP SEQUENCE
11 - 2.4 START-UP INTERLOCKS
11 - 2.5 MANUAL OPERATION
12 - 2.6 FIXED-TIME OPERATION
12 - 2.7 VEHICLE-ACTUATED OPERATION
12 - 2.7.1 General
12 - 2.7.2 Detector actuations
12 - 2.7.3 Minimum green time
12 - 2.7.4 Maximum green time
12 - 2.7.5 All-red interval
13 - 2.7.6 Green extensions
13 - 2.7.7 Maximum reversion
13 - 2.8 FLASHING YELLOW OPERATION
13 - 2.8.1 Required operation
13 - 2.8.2 Conditions for automatic operation
14 - 2.8.3 Automatic re-start facility
14 - 2.9 SEQUENCE AND TIMING OF SIGNAL DISPLAYS
14 - 2.9.1 Sequence
14 - 2.9.2 Timing
14 - 2.10 MONITORING AND CONTROL
15 - SECTION 3 - FUNCTIONAL REQUIREMENTS
15 - 3.1 GENERAL
15 - 3.2 OPERATOR CONTROLS
15 - 3.3 VISUAL MONITORS
16 - 3.4 LAMP MONITORING
16 - 3.5 ACCESS TO CONTROLANDMONITORINGFUNCTIONS
16 - 3.6 REMOTE MANUAL CONTROL FACILITIES
17 - SECTION 4 - LANTERNS
17 - 4.1 GENERAL
17 - 4.2 LANTERN TYPE AND PERFORMANCE
17 - 4.3 AIMING AND ADJUSTMENT
17 - 4.4 TARGET BOARDS
17 - 4.5 VISORS
18 - SECTION 5 - VEHICLE DETECTORS
18 - 5.1 GENERAL
18 - 5.2 DETECTION ZONE
18 - 5.3 DETECTION SPEED
18 - 5.4 PRESENCEDETECTION
18 - 5.5 AIMING AND ADJUSTMENT (FOR POST-MOUNTED DETECTORS)
19 - SECTION 6 - POWER SUPPLY
19 - 6.1 GENERAL
19 - 6.2 LOW-VOLTAGE CUT-OUT
19 - 6.3 MOTOR-DRIVEN GENERATOR
19 - 6.4 BATTERY
19 - 6.5 MAINS POWER
20 - SECTION 7 - ENVIRONMENTAL REQUIREMENTS
20 - 7.1 TEMPERATURE AND HUMIDITY
20 - 7.2 ENCLOSURE PROTECTION
20 - 7.3 MAINS POWER
20 - 7.4 WIND LOADING
20 - 7.5 NOISE CONTROL
20 - 7.6 RADIO INTERFERENCE SUPPRESSION
20 - 7.7 SURGE AND TRANSIENT PROTECTION
20 - 7.8 IMMUNITY FROM ELECTROMAGNETIC INTERFERENCE
21 - APPENDIX A - PURCHASING GUIDELINES
22 - APPENDIX B - SYSTEM ELEMENTS AND OPERATING PRINCIPLES
22 - B1 INTRODUCTION
22 - B2 SYSTEM DESCRIPTION
25 - APPENDIX C - RELATIONSHIP BETWEEN ALL-RED INTERVAL AND TRAVEL DISTANCE

Specifies requirements for the design, construction and performance of three-colour portable signal systems for use where temporary control of vehicular traffic is required, such as road or bridge works. Provides for the two main forms of control, viz. shuttle control and plant crossing control. Does not cover the use of these signal systems in specific road situations.

This Standard specifies requirements for the design, construction and performance of three-colour portable signal systems for use where temporary control of vehicular traffic is required, such as at road or bridge works. It provides for two main forms of control, viz. shuttle control and plant-crossing control.The Standard does not cover the use of portable traffic signal systems in specific road situations which is normally the subject of regulation by the relevant traffic authority.NOTES:1 See Appendix A for the information that should be supplied with an enquiry or order for portable traffic signal systems to the requirements of this Standard.2 Information on the basic system elements and operating principles of portable traffic signal systems is given in Appendix B.3 Guidance on the use of portable traffic signal systems is provided in AS 1742.3.

First published as AS 4191-1994.