Hi here is an example on how to include a route in a workflow so that in a previous activity if the value of a field  in a particular form is either 4 or 5, the HQ has to complete an investigation else (level = 1 to 3) the manager can close the case right away.

Let's see how I succeed: 

1 - Designed my workflow

2- Set the conditions on my route's transitions

3- Apply my workflow variable level

4- Map the wf variable to severity level in accident form

Hope this will help a lot of people

Ciao!