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Untitled PART 4. HIGHWAY TRAFFIC SIGNALS
TABLE OF CONTENTS
Page
SECTIONS
CHAPTER 4A. GENERAL
Section 4A.01
Types ....................................................................................................................................4A-1
Section 4A.02
Definitions Relating to Highway Traffic Signals.................................................................4A-1
CHAPTER 4B. TRAFFIC CONTROL SIGNALSGENERAL
Section 4B.01
General .................................................................................................................................4B-1
Section 4B.02
Basis of Installation or Removal of Traffic Control Signals................................................4B-1
Section 4B.03
Advantages and Disadvantages of Traffic Control Signals..................................................4B-1
Section 4B.04
Alternatives to Traffic Control Signals.................................................................................4B-2
Section 4B.05
Adequate Roadway Capacity ...............................................................................................4B-2
CHAPTER 4C. TRAFFIC CONTROL SIGNAL NEEDS STUDIES
Section 4C.01
Studies and Factors for Justifying Traffic Control Signals ..................................................4C-1
Section 4C.02
Warrant 1, Eight-Hour Vehicular Volume ............................................................................4C-3
Section 4C.03
Warrant 2, Four-Hour Vehicular Volume..............................................................................4C-4
Section 4C.04
Warrant 3, Peak Hour ...........................................................................................................4C-6
Section 4C.05
Warrant 4, Pedestrian Volume ..............................................................................................4C-6
Section 4C.06
Warrant 5, School Crossing..................................................................................................4C-8
Section 4C.07
Warrant 6, Coordinated Signal System ................................................................................4C-8
Section 4C.08
Warrant 7, Crash Experience................................................................................................4C-9
Section 4C.09
Warrant 8, Roadway Network..............................................................................................4C-9
CHAPTER 4D. TRAFFIC CONTROL SIGNAL FEATURES
Section 4D.01
General .................................................................................................................................4D-1
Section 4D.02
Responsibility for Operation and Maintenance ...................................................................4D-1
Section 4D.03
Provisions for Pedestrians....................................................................................................4D-2
Section 4D.04
Meaning of Vehicular Signal Indications.............................................................................4D-2
Section 4D.05
Application of Steady Signal Indications ............................................................................4D-3
Section 4D.06
Application of Steady Signal Indications for Left Turns.....................................................4D-5
Section 4D.07
Application of Steady Signal Indications for Right Turns ..................................................4D-7
Section 4D.08
Prohibited Steady Signal Indications ...................................................................................4D-8
Section 4D.09
Unexpected Conflicts During Green or Yellow Intervals ....................................................4D-9
Section 4D.10
Yellow Change and Red Clearance Intervals.......................................................................4D-9
Section 4D.11
Application of Flashing Signal Indications .......................................................................4D-10
Section 4D.12
Flashing Operation of Traffic Control Signals...................................................................4D-10
Section 4D.13
Preemption and Priority Control of Traffic Control Signals..............................................4D-11
Section 4D.14
Coordination of Traffic Control Signals ............................................................................4D-13
Section 4D.15
Size, Number, and Location of Signal Faces by Approach ...............................................4D-13
Section 4D.16
Number and Arrangement of Signal Sections in Vehicular TrafficControl Signal Faces..4D-17
Section 4D.17
Visibility, Shielding, and Positioning of Signal Faces.......................................................4D-19
Section 4D.18
Design, Illumination, and Color of Signal Sections ..........................................................4D-20
Section 4D.19
Lateral Placement of Signal Supports and Cabinets..........................................................4D-21
Section 4D.20
Temporary Traffic Control Signals ....................................................................................4D-21
Section 4D.21
Traffic Signal Signs, Auxiliary...........................................................................................4D-22
Section 4D.22
Removal of Unauthorized Signals .....................................................................................4D-22
2006 Edition
Page TC4-1 CHAPTER 4E. PEDESTRIAN CONTROL FEATURES
Section 4E.01
Pedestrian Signal Heads .......................................................................................................4E-1
Section 4E.02
Meaning of Pedestrian Signal Head Indications ..................................................................4E-1
Section 4E.03
Application of Pedestrian Signal Heads...............................................................................4E-1
Section 4E.04
Size, Design, and Illumination of Pedestrian Signal Head Indications ...............................4E-2
Section 4E.05
Location and Height of Pedestrian Signal Heads.................................................................4E-3
Section 4E.06
Accessible Pedestrian Signals ..............................................................................................4E-3
Section 4E.07
Countdown Pedestrian Signals .............................................................................................4E-5
Section 4E.08
Pedestrian Detectors .............................................................................................................4E-6
Section 4E.09
Accessible Pedestrian Signal Detectors ...............................................................................4E-6
Section 4E.10
Pedestrian Intervals and Signal Phases ................................................................................4E-8
CHAPTER 4F.
TRAFFIC CONTROL SIGNALS FOR EMERGENCY VEHICLE ACCESS
Section 4F.01
Applications of Emergency-Vehicle Traffic Control Signals ...............................................4F-1
Section 4F.02
Design of Emergency-Vehicle Traffic Control Signals ........................................................4F-1
Section 4F.03
Operation of Emergency-Vehicle Traffic Control Signals....................................................4F-2
Section 4F.04
Application of Emergency Vehicle Warning Beacon............................................................4F-2
CHAPTER 4G. TRAFFIC CONTROL SIGNALS FOR ONE-LANE, TWO-WAY FACILITIES
Section 4G.01
Application of Traffic Control Signals for One-Lane, Two-Way Facilities.........................4G-1
Section 4G.02
Design of Traffic Control Signals for One-Lane, Two-Way Facilities ................................4G-1
Section 4G.03
Operation of Traffic Control Signals for One-Lane, Two-Way Facilities ...........................4G-1
CHAPTER 4H. TRAFFIC CONTROL SIGNALS FOR FREEWAY ENTRANCE RAMPS
Section 4H.01
Application of Freeway Entrance Ramp Control Signals....................................................4H-1
Section 4H.02
Design of Freeway Entrance Ramp Control Signals ...........................................................4H-1
CHAPTER 4I.
TRAFFIC CONTROL FOR MOVABLE BRIDGES
Section 4I.01
Application of Traffic Control for Movable Bridges.............................................................4I-1
Section 4I.02
Design and Location of Movable Bridge Signals and Gates ................................................4I-1
Section 4I.03
Operation of Movable Bridge Signals and Gates..................................................................4I-2
CHAPTER 4J.
LANE-USE CONTROL SIGNALS
Section 4J.01
Application of Lane-Use Control Signals .............................................................................4J-1
Section 4J.02
Meaning of Lane-Use Control Signal Indications ................................................................4J-1
Section 4J.03
Design of Lane-Use Control Signals.....................................................................................4J-2
Section 4J.04
Operation of Lane-Use Control Signals................................................................................4J-3
CHAPTER 4K. FLASHING BEACONS
Section 4K.01
General Design and Operation of Flashing Beacons........................................................