Review Your Results

Once your junction study is active, the results page gives you a full view of intersection performance. It includes:

  • A summary of your junction configuration and management options
  • Approach-level metrics and turn ratios in real time
  • Individual vehicle trajectory records for a selected time window
  • Aggregated performance data across approaches and exits over a defined date range
  • A colour-coded map showing movement-level delay and turn volumes
  • Options to assign labels and manage access to your study

Results can be viewed across seven tabs at the top of the screen:

  • The Overview and Result tabs give you a summary of your junction configuration and approach-level metrics.
  • The Trace and Report tabs let you explore individual vehicle trajectories and aggregated performance data over a selected date range.
  • The Visualization tab displays a colour-coded map showing movement-level delay and turn volumes at the intersection.
  • The Labels tab allows you to assign names and metadata to your junction study, making it easier to organize and manage your projects.
  • The Access tab lets you manage who can view or access the study.

Overview

When you open a Junction study, you land on the Overview tab. This gives you a summary of the junction configuration alongside a map of the intersection.

Managing Your Junction Study

Three management options are available in the top-right corner of the Overview panel:

  • Edit: Modify the junction name, boundary, or approach configuration
  • Share: Generate a shareable link for external stakeholders with read-only access. You set an expiry date when creating the link, once it expires, access is revoked.
  • Delete: Permanently remove the junction study from your workspace.

Result

The Result tab shows real-time approach-level data. The left panel lists all active approaches, and the map displays the intersection with approach roads highlighted in blue and exit roads highlighted in grey.

The data refreshes automatically. The countdown timer next to the Auto Refresh Data toggle shows when the next refresh will occur. Toggle this off if you want to pause live updates.

Approach Details

Clicking any approach opens a details panel with current performance metrics and a Turn Ratios breakdown showing the percentage of traffic exiting via each detected exit road.

The metrics displayed are Delay, Usual Delay, Queue, Travel Time, Free Flow Time, and Volume Per Hour. A couple of these are worth clarifying in context:

  • Usual Delay: reflects the typical delay expected at this time of day based on historical patterns, making it useful for quickly assessing whether current conditions are abnormal
  • Queue: is expressed in metres and represents the estimated queue length on that approach at the time of viewing

Switching to Archive Data

By default, the Result tab shows live data. To switch to historical data, click the double arrow icon at the top of the approach details panel. This opens archive mode with Arrivals and Exits filters that control what the chart displays.

The Arrivals dropdown defines where along the approach vehicles are measured:

The Exits dropdown filters the chart to show only vehicles that left via a specific exit road.

Trace

The Trace tab shows individual vehicle trajectory records through the junction. Set a From Date and To Date and click Submit to load records. Each row represents a single vehicle movement from entry to exit.

A few columns that may benefit from some context:

  • Control Delay: The additional time vehicles experience at the intersection due to traffic control devices, including time lost in deceleration, stopping, queue move-up, and acceleration. It is a key factor in determining Level of Service (LOS).
  • Approach Delay: Similar to Control Delay but measured on the approach only, it does not account for travel within or beyond the intersection.
  • First Stop Distance: The distance from the vehicle's first stop to the start of the junction, in metres
  • Arrivals: A timestamped log of the vehicle's speed at each detection point (350ft, 40ft, stop line)

Arrival Points, Control Statistics, and Control Geometry

Arrival points – up to three designated locations along the approach to a junction, where statistics are calculated in the Enhanced Junction Analytics module. By default, these points are located at:

  • the stop bar (0 feet)
  • 40 feet from the junction
  • 350 feet from the junction

Control statistics – set of metrics used to assess the impact of traffic signals on traffic flow. These statistics are calculated based on an additional geometric configuration referred to as "control geometry."

Control geometry – the underlying geometry used by the application to calculate control statistics. It is constructed as follows:

  • Approach: extends backward to the nearest signalized intersection or 1000 meters (whichever is shorter).
  • Exit: extends forward to the nearest signalized intersection or 250 meters (whichever is shorter).

These points provide critical data for analyzing vehicle behavior and performance as they approach the junction.

Control Delay Methodology

Control delay is a traffic performance metric that quantifies the additional time a vehicle spends traversing an intersection due to deceleration, stopping, idling, and acceleration, compared to free-flow travel conditions. It reflects the extra time lost due to traffic control devices (like signals, signs, or congestion at intersections) and is commonly used in Level of Service (LOS) assessments for intersections.

Calculation boundaries: Approach extends backward to the nearest signalized intersection or 1000m (whichever is shorter). Exit extends forward to the nearest signalized intersection or 250m (whichever is shorter).

Steps to calculate control delay

1. Identify points

  • Deceleration point: the point where deceleration begins from the maximum speed prior to the first stop.
    • If no stop is present, or if the stop occurs within the first segment, this point is calculated based on the entire approach.
  • Acceleration endpoint: the point where the vehicle reaches its maximum speed after passing through the intersection.

2. Calculate metrics

  • Travel distance: from the deceleration point to the acceleration endpoint.
  • Initial speed: speed prior to deceleration.
  • Actual travel time: total time taken from the deceleration point to the acceleration endpoint.

3. Control delay formula

Control Delay = (Travel Distance / Initial Speed) - Actual Travel Time

Approach Delay Methodology

Approach delay refers to the additional time a vehicle experiences while approaching an intersection due to deceleration and the influence of traffic signals or other factors that affect its progress. It is calculated by comparing the actual time taken to travel from the deceleration point to the end of the approach with the theoretical time it would take at free-flow speed.

Calculation boundaries: Approach extends backward to the nearest signalized intersection or 1000m (whichever is shorter). Exit extends forward to the nearest signalized intersection or 250m (whichever is shorter).

Steps to calculate approach delay

1. Identify points

  • Deceleration point: the point where deceleration begins from the maximum speed prior to the first stop. If no stop is present, or if the stop occurs within the first segment, this point is calculated based on the entire approach.

2. Calculate metrics

  • Travel distance: from deceleration to the end of the approach.
  • Initial speed: Pre-deceleration speed.
  • Actual travel time: Total time from deceleration to the end of the approach.

3. Approach delay formula

Approach Delay = Actual Travel Time - (Travel Distance / Initial Speed)

Report

The Report tab provides the same data as Trace but aggregated into time buckets, making it easier to identify trends and patterns over time. Set a From Date, To Date, Aggregation, and Granularity, then click Submit.

A download button in the top-right corner lets you export the report data.

Granularity

Controls the size of each time bucket in the results.

Aggregation

Controls how data within each time bucket is summarized across the selected date range.

Visualization

The Visualization tab displays a colour-coded map of the intersection showing movement-level delay and turn volumes. It gives you an at-a-glance view of where congestion is concentrated across all movements at the junction.

Set a Date Range, select the Days of the Week and Hours of the Day you want to include, then click Submit. Use the AM, PM, AM&PM, or All quick-select buttons to filter by time of day.

Each arrow represents a turn movement. The colour indicates the level of delay from green (low) through yellow and orange to red (severe). The central circle shows the average delay across all movements.

The metric displayed on the map can be changed using the dropdown in the top-right corner. It defaults to Control Delay (s) . The available options are:

  • Average Trajectory Count
  • Average Speed (km/h)
  • Travel Time (s)
  • Approach Delay (s)
  • Control Delay (s)
  • Number of Stops
  • AOG (%)
  • Split Failure (%)
  • Acceleration Endpoint Speed (km/h): the maximum speed of the vehicle within the exit road
  • Deceleration Point Speed (km/h): the maximum speed of the vehicle within the approach road

Movement Charts

Clicking any value on the map opens a details panel for that movement. The panel has three tabs: Percentage, Hourly, and Daily.

Percentage

The Percentage tab is the default view when you open the panel. It shows two pie charts for the selected movement, the distribution of vehicles by number of stops, and the distribution by Level of Service grade (A through F).

Hourly

The Hourly tab shows the selected metric broken down by hour of the day. Use the dropdown in the top-right corner of the panel to switch between available metrics.

Clicking any bar drills down to show the 15-minute intervals within that hour.

To return to the full hourly view, click the control_delay breadcrumb at the top of the chart.

Daily

Shows the selected metric broken down by day of the week across your selected date range.

The Daily tab shows the same metric broken down by day of the week across your selected date range.

Viewing Live Junction Data on the Traffic Map

Your active junction studies can also be monitored in real time from the Traffic Map, accessible from the left navigation menu. Each junction is represented as a colour-coded dot on the map, with the colour indicating the current Level of Service at that intersection.

The legend in the bottom-left corner shows the Junction LOS colour scale from A (green) through to F (red).

Clicking on any junction dot opens the same details panel you see under the Visualization tab, giving you access to the Percentage, Hourly, and Daily movement charts for that junction without leaving the Traffic Map.

Last Edited: September 17, 2026