Complex sentence: This segment changes directions to accommodate the traffic flow at different times of day, so in the morning until 1PM, it is open to downtown-bound eastward flowing traffic, while it is open to westbound traffic beginning at 2PM thru the evening.
Split into simpler sentences: This segment changes directions to accommodate the traffic flow at different times of day. In the morning until 1PM, it is open to downtown-bound eastward flowing traffic, while it is open to westbound traffic beginning at 2PM thru the evening.