A tool for adding capabilities of What-IF analysis and dynamic routing has been released in 2019 september.
You can test is on: https://www.snap4city.org/dashboardSmartCity/view/index.php?iddasboard=MjE4Nw==
and on: https://www.snap4city.org/dashboardSmartCity/view/index.php?iddasboard=MjE5MA== in which you may have also orthomaps changing
1) create a scenario, composed by one or more areas in which one cannot pass since they have been closed or they have to avoided for some reason: floading, terroristic attacks, restoring works, etc.
2) save the scenario, give a name. It can be a private scenario or a public one.
3) start what-if analysis, and perform the routing from 2 or more points