Complex sentence: The Mangati Road intersection has had some safety improvements made over the years, including a long left turn bay being added, and when the by-pass is complete, right hand turns onto it from Mangati Road will no longer be possible.
Split into simpler sentences: The Mangati Road intersection has had some safety improvements made, including a long left turn bay being added. When the by-pass is complete right hand turns onto it from Mangati Road will no longer be possible.