Complex sentence: Here, northbound VT 14 is joined by westbound VT 15, as they run concurrently to the northwest for about, crossing the Lamoille River just north of the town center, after which VT 15 continues west as the two routes separate.
Split into simpler sentences: Here, northbound VT 14 is joined by westbound VT 15. The pair head northwest for about, crossing the Lamoille River just north of the town center after which the two routes separate.