Total Transportation Services (TTSI) Southern California drayage division runs a fleet of fifty Near-Zero Emissions (NZE) and Zero-Emissions (ZE) trucks in the Ports of Los Angeles and Long Beach. Our NZE Cummins Westport engines operate on renewable natural gas (RNG) and run 90% cleaner than the cleanest diesel technology available.  At first, our drivers were skeptical – but after driving…