The new Tier 3-plus engines emit 85% less diesel particulate matter and 38% less nitrogen oxide than the engines they are replacing. The older engines, which came online three years ago, had already reduced pollution dramatically compared to previous generations.
Overall, the Tier 3-plus engines represent a reduction of diesel particulates by 95.6% and nitrogen oxide by 67% compared to engines that were servicing the ports just five years ago.
PHL has a total of 23 locomotives servicing the ports complex. The new engines are being installed in Tacoma (WA) by Progress Rail Services Corporation, a wholly owned subsidiary of Caterpillar Inc. The programme was partially funded with a US$12m grant from the Carl Moyer Memorial Air Quality Standards Attainment Programme, which is administered by the South Coast Air Quality Management District and California Air Resources Board.