Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 12 Page 8 of 265
4.7 Handset Interface (RS232 Port) ................................................................. 76
5 STAGES ............................................................................................................. 77
5.1 Facilities ..................................................................................................... 77
5.2 Allocation of Phases ................................................................................... 77
5.3 Stages Active .............................................................................................. 77
5.4 Interstage Period ........................................................................................ 77
5.5 Stage Change Algorithm ............................................................................. 77
5.6 Parallel Stage Streaming ............................................................................ 80
6 PHASES ............................................................................................................. 82
6.1 Facilities ..................................................................................................... 82
6.2 Types of Phases ......................................................................................... 82
6.3 Conflicting Phases ...................................................................................... 86
6.4 Opposing Phases ....................................................................................... 86
6.5 Timing Periods ............................................................................................ 87
6.6 Conditions of Appearance .......................................................................... 92
6.7 Fixed Phases .............................................................................................. 94
6.8 Non-Fixed Phases ...................................................................................... 94
6.9 Conditions of Termination ........................................................................... 94
6.10 Early Termination of Phases....................................................................... 95
6.11 Pedestrian Phase Types............................................................................. 95
7 DEMANDS AND EXTENSIONS ....................................................................... 105
7.1 General Description .................................................................................. 105
7.2 Types of Demands .................................................................................... 105
7.3 Origins of Demands and Extensions ........................................................ 105
7.4 Pedestrian Demand Control ..................................................................... 107
7.5 Operation during Certain Modes .............................................................. 111
8 CALL/CANCEL ................................................................................................ 113
9 HIGH SPEED VEHICLE DETECTION .............................................................. 115
9.1 Speed Discrimination Equipment (SDE) ................................................... 115
9.2 Speed Assessment (SA) ........................................................................... 116
9.3 Assessors Available ................................................................................. 116
9.4 SDE/SA Actions ........................................................................................ 117
9.5 SDE/SA Parallel Stage Streaming Facilities ............................................. 118
9.6 SDE/SA on Green Arrows ......................................................................... 118
9.7 Common Approach Lanes ........................................................................ 118
9.8 Other Loop Spacing .................................................................................. 118
10 ALL-RED DISPLAYS ....................................................................................... 119
10.1 All-Red Stage ........................................................................................... 119
10.2 Red Extension During Interstage .............................................................. 120
11 PHASE DELAYS .............................................................................................. 122
11.1 General Description .................................................................................. 122
11.2 Phases Losing Right-Of-Way ................................................................... 122
11.3 Phases Gaining Right-Of-Way ................................................................. 124
11.4 Delay Timer .............................................................................................. 125
11.5 Phase Delay Handset Commands ............................................................ 125