These initial successes, however, do not mean that electronic-tolling schemes will take the world by storm. One barrier is common standards.

最初的成功并不意味着电子收费计划将席卷全球，一个最大的障碍是通用标准。

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We could start the transition today, using existing low-cost all-electronic tolling (transponders and license-plate imaging) on all limited-access highways, such as Interstates and expressways.

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