It is referring to the part beneath the toll road overpass/bridge.

It's screwy since StreetComplete just looks at the whole way, rather the part/section just below an object.  The way can be split up for a more precise section if you desire.

For example, if a freeway segment is 5 miles long, and goes under an overpass near one end, the quest will shop up at the 2.5 mile mark or near the midpoint, rather than where that overpass is.  So in this case. The segment should be divided.

I am hoping this helps a bit.

Also, welcome to OSM and StreetComplete!  Don't hesitate to reach out if you have any questions!