Complex sentence: When Interstate 40 opened and bypassed two-lane Route 66, commerce collapsed and the businesses that were once Bagdad all closed and eventually the town was completely razed, marked today by a clearing on the north side of old Route 66 and a single tree.
Split into simpler sentences: When Interstate 40 opened and bypassed two-lane Route 66, commerce collapsed and the businesses that were once Bagdad all closed and eventually the town was completely razed. It is marked today by a clearing on the north side of old Route 66 and a single tree.