Complex sentence: The Raritan line was never electrified when it was built and neither Conrail nor New Jersey Transit feel it would be profitable to do so now, pulse only electric-powered trains are allowed to operate into Manhattan below 96th Street.
Split into simpler sentences: The Raritan line was never electrified when it was built and neither Conrail nor New Jersey Transit feel it would be profitable to do so now. Thus, the trains cannot enter Manhattan as only electric-powered trains are allowed to operate elow 96th Street.