Question on US 3/4 HI Chart
On the Jeppesen US 3/4 chart (#4 side) HI Chart parallel to J174 southeast northeast)bound there are brown dashed lines that connect between intersections. I assume they are airways. They are named VS1 VS2 VS3 up to VS7.
I cannot find an example in the Jeppesen introduction guide.
Any detailed information would be appreciated
Is it just an American Airlines tailored item?