CAMDEN, NJ — NJ Transit’s River Line announced this week that it will replace the light rail’s current 15-year-old engines with 20 Tier IV diesel engines by the Spring of 2022.

It will be done in an effort to align with current EPA emissions standards. According to the company, it will also result in fuel savings of 10 to 15 percent.

“NJ Transit service gets people out of cars and is one of the best ways to limit state-wide greenhouse gas emissions,” said NJ Transit President and CEO Kevin Corbett in a statement. “At the same time, these engines will help NJ Transit reduce its carbon footprint and operating costs through better fuel efficiency.”

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The River Line spans 34 miles from Trenton to Camden.

NJ Transit officials said that the $700,000 “retrofit” will not impact current services.

The upgrades will include heating systems on the cars, installation of auxiliary power to reduce down time, new control and diagnostic features, and an enhancement of the fire suppression system to expand the useful life of existing River Line vehicles to 30 years.