Complex sentence: State Route 138 crosses Interstate 15 in the Cajon Pass; from Interstate 15 to State Route 173, near the northwest corner of Silverwood Lake, traffic on State Route 138 is rather sparse.
Split into simpler sentences: State Route 138 crosses Interstate 15 in the Cajon Pass. From Interstate 15 to State Route 173, near the northwest corner of Silverwood Lake, traffic on State Route 138 is rather sparse.