Scenario editor is (one day) software for editing road networks and scenarios for traffic simulation.

Git, Node.js and npm install:

Before getting started you'll need to install git, node.js and npm(npm comes with node.js). Here are instructions for installing node.js as well as reference to installing git: http://howtonode.org/how-to-install-nodejs

Please see the Scenario Edit Wiki (https://github.com/calpath/scenario-editor/wiki) under Build and Run on how to develop with it.