Complex sentence: The two carriageways of Rodovia dos Imigrantes are both fully reversible and traffic is managed to flow either bidirectionally (uphill on one carriageway and downhill on the other) or unidirectionally (uphill or downhill on both carriageways), depending on demand.
Split into simpler sentences: The two carriageways of Rodovia dos Imigrantes are both fully reversible. Traffic is managed to flow either bidirectionally (uphill on one carriageway and downhill on the other) or unidirectionally (uphill or downhill on both carriageways), depending on demand.