Traffic Lights Course

Lesson 1 • Standard Signal Indications and Meanings

Defines each colour and arrow indication and its required driver response. Provides the semantic baseline for all subsequent operational content.

Lesson 2 • Regulatory and Safety Framework

Introduces the standards bodies and manuals that govern signal design. Students understand compliance obligations before applying design concepts.

Lesson 3 • Core Signal Components and Hardware

Identifies physical parts of a standard signal head and cabinet. Connects hardware knowledge to later maintenance and troubleshooting topics.

Lesson 1 • Peak Hour and Design Hour Concepts

Explains peak hour factor and design hour volume derivation. Connects raw counts to the representative volumes used in timing calculations.

Lesson 2 • Types of Traffic Counts

Distinguishes turning-movement, classification, and speed counts by purpose. Aligns data type selection with downstream timing and warrant analysis needs.

Lesson 3 • Manual and Automated Count Methods

Compares field observers, video, and sensor-based collection approaches. Students select appropriate methods based on accuracy and resource constraints.

Lesson 4 • Data Quality and Validation

Establishes checks for completeness, consistency, and plausibility of count data. Prevents downstream timing errors caused by flawed inputs.

Lesson 1 • Timing Plan Documentation

Covers how to record and present a completed timing plan. Prepares students for controller programming covered in later chapters.

Lesson 2 • Minimum Green and Pedestrian Timing

Determines minimum green durations driven by pedestrian crossing needs. Links accessibility requirements introduced in Chapter 1 to numeric outputs.

Lesson 3 • Phases, Intervals, and Cycles

Defines phase, interval, and cycle as the building blocks of timing. Establishes vocabulary used throughout all timing and coordination chapters.

Lesson 4 • Calculating Yellow and All-Red Clearance

Applies kinematic formulas to derive safe clearance intervals. Ensures students can justify timing values with engineering rationale.

Lesson 1 • Multi-Leg and Skewed Intersection Phasing

Addresses phasing challenges unique to T-intersections, five-leg, and skewed layouts. Prepares students for non-standard geometries encountered in the field.

Lesson 2 • Reading and Interpreting Intersection Plans

Develops ability to extract lane configuration and geometry from engineering drawings. Accurate geometry reading is prerequisite to all phase design work.

Lesson 3 • Conflict Point Analysis

Maps crossing, merging, and diverging conflict points for any intersection layout. Conflict identification directly determines which movements require separate phases.

Lesson 4 • Protected and Permissive Left-Turn Phasing

Compares protected, permissive, and protected-permissive left-turn modes. Students select the appropriate mode based on volume, speed, and geometry criteria.

Lesson 1 • Controller Types and Architectures

Surveys NEMA TS-1, TS-2, and ATC controller families and their capabilities. Establishes hardware context before students interact with programming interfaces.

Lesson 2 • Time-of-Day and Day-of-Week Plans

Programs multiple timing plans and the schedules that activate them automatically. Enables students to implement the multi-plan strategies covered in later chapters.

Lesson 3 • Controller Testing and Verification

Applies systematic checks to confirm programmed parameters produce correct signal operation. Establishes quality assurance habits essential before any live activation.

Lesson 4 • Entering Phase and Timing Parameters

Walks through the step-by-step process of keying timing values into a controller. Directly applies the timing calculations developed in Chapter 2.

Lesson 1 • Transition and Offset Management

Manages the transition between timing plans to minimise disruption to traffic flow. Addresses the operational challenge of plan switching in live corridors.

Lesson 2 • Time-Space Diagram Construction

Builds time-space diagrams manually to visualise green band relationships. Develops intuition that supports later use of automated optimisation software.

Lesson 3 • Principles of Signal Coordination

Explains offset, bandwidth, and progression speed as the core coordination variables. Provides conceptual foundation before students apply coordination tools.

Lesson 4 • Evaluating Coordination Effectiveness

Applies field and simulation metrics to assess whether coordination goals are met. Closes the design loop by linking outcomes back to timing adjustments.

Lesson 1 • Evaluating Adaptive System Performance

Defines metrics and methods for assessing adaptive control against fixed-time benchmarks. Reinforces the evaluation framework established in Chapter 6.

Lesson 2 • Detection Strategies for Actuation

Selects detector placement and timing parameters to achieve desired actuated behaviour. Directly extends detector configuration skills from Chapter 5.

Lesson 3 • Semi-Actuated vs. Fully Actuated Control

Contrasts fixed, semi-actuated, and fully actuated control modes by operational logic. Builds on controller programming skills to introduce demand-responsive timing.

Lesson 4 • Implementing and Tuning Adaptive Systems

Covers the deployment workflow from baseline calibration to performance tuning. Students apply evaluation methods from Chapter 6 to adaptive system outputs.

Lesson 1 • Maintenance Documentation and Asset Management

Establishes standards for logging work orders, parts, and inspection results. Supports lifecycle cost analysis and capital replacement planning.

Lesson 2 • Common Hardware Failures and Causes

Catalogues frequent failure modes in signal heads, detectors, and controllers. Provides the diagnostic vocabulary needed for systematic fault isolation.

Lesson 3 • Systematic Fault Isolation Procedures

Applies a structured diagnostic process to isolate faults to a specific component. Reduces mean time to repair by eliminating guesswork in the field.

Lesson 4 • Preventive Maintenance Programmes

Establishes scheduled inspection and servicing routines that extend equipment life. Grounds students in proactive practices before reactive troubleshooting is introduced.