What is Impact?

Impact allows you to build mobility network scenarios, analyze and compare them without the technical complexity of a full-blown traffic model.

This is done in three following steps:

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Edit

Edit the network to represent a scenario.


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Test

Analyze and compare the impact of different scenarios.


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Publish

Communicate scenarios and/or results with project partners, the public, etc. interactively and stylishly.


If you want an Impact for your city or study, get in touch, we're happy to help!

How does it work?

Impact consists of two components:

  1. A web application to edit and test a scenario.
  2. A QGIS toolbox to:
    1. Analyze and compare scenarios.
    2. Work with origin-destination data.
    3. Present the results.

Web application

Provides you with the necessary tools to customize the existing road network and subsequently calculate routes based on the customized netwrok by-means-of a built-in route planner. These tools allow you to customize anything on the network including but not limited to: changing existing roads, remove roads or add new ones, edit bicycle lanes, add pedestrian crossings, change vehicle restrictions, modify one-way restrictions, road closures, etc.

Edit

To start editing, first zoom-in to the area where you want to edit the network and then click on the edit menu.

Once clicked on the edit menu, the map switches to the Edit-mode in the exact same area.

If on the previous page and before clicking on the edit menu you have not zoomed-in enough on the edit area, editable map will also open in a zoomed-out level and you will see no link to edit. However, as soon as you zoom to the edit area, the links start appearing for you to edit. Below, you can find two examples on how editing the netwrok is done.

Example 1: Road Closure

  • Click on the link that you wish to close it off for all traffic.
  • Once the link is clicked, it starts glowing in red and options of the feature-bar (on the left) become editable.
  • Now in the “Under construction” section of the feature-bar, click on the checkbox. Once the checkbox is clicked, it changes from “🔳No” to “☑️Yes” and the corresponding link will be marked by a yellow-brown dashed line.
  • Once you’re done editing, click on the save menu on top-right of the map and then click on the “Upload” button.
  • Once changes are saved, if you go back to the Test-mode by clicking on the Test menu, you will see that this link is now marked with a dashed-line.

Example 2: Vehicle Restrictions

  • Click on the desired link.
  • Once the link started glowing in red and options of the feature-bar become editable, find “Allowed Access during this phase” section.
  • Click on the text box next to the vehilce type for which you would like to edit the access.
  • Select the relevant access value from the dropdown menu. Should you need more information about access values, please click here.
  • Once you’re done editing, click on the save menu on top-right of the map and then click on the “Upload” button.

Test

Once the network is edited as per the scenario in hand (e.g., Road Constructions/works), you can start experimenting with the changes that this scenario will bring about by switching to the Test-mode. Test-mode is an interactive map featuring a route planner that can be also shared online.

Test-mode allows you to verify accessibility as well as possible routing changes for an Origin and Destination pair. This verification is simply done by 2 mouse clicks on the map where:

  • The 1st click will be routing’s Origin and displayed as Ⓐ
  • The 2nd click will be routing’s Destination and displayed as Ⓑ

Subsequently, you can select your desired routing profile/s in the "ROUTING" box at the top-left corner of the map.

Depending on your Impact subscription, a number of instances will be at your disposal to create scenarios. It is recommended to keep instance "0” as the Base-Scenario representing the existing situation and edit the network in other instances as per your scenarios (e.g., future plans, etc.). This allows for an objective comparison between the existing situation and created scenarios as well as in between scenarios. See below for an example:

Below you can find an example of this interactive map in which we've added a set of road closures to the network. In addition to the routing changes, you'll also notice a change in the color of some links (white -> red or vice versa) upon changing the routing profile (mode of transport). This color change reflects the changes in the accessibility (red = inaccessible) caused by these road closures.

QGIS toolbox

A QGIS plugin with a set of network analysis tools using origin and destination data with which you can study the different variants and transport modes of the network.

The plugin allows you to:

  1. Calculate 1000s or routes in bulk.
  2. Import or download origin-destination data.
  3. Aggregate traffic counts on each segment of the generated routes.

There are currently two versions of the Impact Toolbox available. The first is the online version that can be found in the QGIS repository. The second and more comprehensive version is the local version that is available to all our clients to be installed manually. These two versions will be eventually merged as one online version that can be installed via the QGIS repository. Therefore, we continue with describing the existing (we're constantly working to add more) functionalities of the comprehensive version.

Functionalities

The toolbox is currently consisting of four widgets.

1. Routing API

This widget allows you to calculate routings based on the existing network and a given routing profile (mode of transport)between:

  • A set of Points of Interest (POIs): for the case where all points serve as both Origin and Destination.
  • A set of Origins and a set of Destinations: for the case where points have distinct roles as either Origin or Destination.

2. Impact API

This widget allows you to calculate routings based a given routing profile (mode of transport) for scenario/s that you’ve created in Impact. between:

  • A set of Points of Interest (POIs): for the case where all points serve as both Origin and Destination.
  • A set of Origins and a set of Destinations: for the case where points have distinct roles as either Origin or Destination.

3. Origin-Destination Pairs: Open Data API

This widget allows you to use our Open Data API[1] to calculate routings[2] from one area to another based on a given routing profile (mode of transport) for:

  • The existing network.
  • Scenario/s that you’ve created in Impact.

4. Origin-Destination Pairs: Local Data

This widget allows you to:

  • Transform your local Origin-Destination database into a routable Origin-Destination pairs (a.k.a. Trip from i to j, abbreviated as; Tij) GeoJSON file.
  • Below is a sneak peek of the Excel template for transforming your local Origin-Destination database into routable Origin-Destination pairs (it is possible to include travelers' count using various modes of transport for each OD pair).
  • Calculate existing routines[3] based on a given routing profile (mode of transport) for the Tij GeoJSON file that you’ve created from your local Origin-Destination database.
  • Calculate routings[4] based on a given routing profile (mode of transport) and the Tij GeoJSON file that you’ve created from your local Origin-Destination database for scenario/s that you’ve created in Impact.

Either using our Open Data API or your local Origin-Destination database, the results of your network analysis will be as elegant as shown below:

If you're thinking that Impact sounds too good to be true, why don't you give it a try for free? 😉


[1] Our Open Data API currently features the data from “FOD Mobiliteit Enquête woonwerkverkeer 2017”. More open data will be available soon.

[2] Calculated routings are including a frequency of use and an aggregate traffic count for each road segment.

[3,4] Calculated routings are including a frequency of use and an aggregate traffic count (provided that your local database has travelers’ counts for each OD pairs) for each road segment.