Rubber tyred gantry crane

Due to the lack of an electrical grid to dump energy when containers are being lowered they often have large resistor packs to rapidly dissipate the energy of a lowering or decelerating container.

[2] Diesel-powered RTGs are notorious polluters at ports, as each burns up to 10 US gallons per hour (8.3 imp gal/h; 38 L/h) of diesel fuel.

[4] The first electrified rubber-tyred gantry cranes (ERTG) in China was unveiled by the She Kou container terminal (SCT) in Shenzhen in Aug 2008.

Rubber-tired gantry cranes are also being electrified at the Port of Long Beach to improve air quality, with funding from the California Energy Commission.

Some RTGs use automation technology at ports to reduce human involvement in processing and handling cargo.