Further evidence - see satellite view from Google Earth.  Footpath runs along left side of side road from Ballatessan Meadow through to Creggan's Avenue.
https://earth.google.com/web/@54.21777149,-4.69505079,30.87821175a,57.35312027d,35y,-0h,0t,0r/data=CgRCAggBSg0I____________ARAA