Complex sentence: Arkansas 549 northern end is now at the at-grade intersection with US-71/US-59 in Texas at the State Line, It's southern end is at the at-grade intersection with US-71 in Doddridge, Arkansas.
Split into simpler sentences: Arkansas 549 northern end is now at the at-grade intersection with US-71/US-59 in Texas at the State Line. Its southern end is at the at-grade intersection with US-71 in Doddridge, Arkansas.