Complex sentence: The Green Line was to be integrated into this expansion; however, due to neighborhoring community resistance, the Green Line was not extended into the airport; again, as another compromise, a free shuttle transports Green Line riders to LAX and back.
Split into simpler sentences: The Green Line was to be integrated into this expansion; however, due to neighborhoring community resistance, the Green Line was not extended into the airport. As another compromise, a free shuttle transports Green Line riders to LAX and back.