Complex sentence: When in operation, usually six departures from each terminal are scheduled per day and normally only essential vehicles and local residents may use the service; it is a 1.75-hour, fare-free, crossing.
Split into simpler sentences: When in operation, usually six departures from each terminal are scheduled per day, and normally only essential vehicles and local residents may use the service. It is a 1.75-hour, fare-free, crossing.