According to iSuppli, a Californian research firm, less than 1% of new cars have such “eco-routing” systems fitted, but it expects that by 2020 a third will.

根据加利福尼亚一家研究公司iSuppl的计算：已经装上这种“环保协助”体系的新车不到1%。 但到2020年，安装这种体系的车辆有望上升到三成。

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The system also includes an eco-routing - providing the driver with an option to select the most energy efficient route.

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