Impact allows you to build mobility network scenarios, analyze and compare them without the technical complexity of a full-blown traffic model.
You start with the existing road network and make edits to it to represent changes you want to simulate. After you have modelled your changes you can calculate routes based on the customized network 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.
By default you should have access to at least one Project. A project represents one change, an event, a roadwork or a new low traffic neighbourhood. A project can have multiple scenarios allowing you to compare different possiblity for the same project.
Once you have a scenario open you can start editing the network. To start zoom-in to the area where you want to edit the network and then click edit.
Once clicked on the edit menu, the map switches to the Edit-mode in the exact same area.
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:
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: