The math models of the tree structure chart and the net structure chart are formed by describing the different road state abstractly.

将各种路况进行抽象化描述，形成了描述高速公路物理结构的树状结构图和网状结构图模型。

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They would be allowed to send groups of self-driving cars on cross-state road trips, and even set up on-demand fleets of self-driving cars, like the one General Motors and Lyft are building.

他们将被允许派遣自动驾驶汽车小组进行跨州公路旅行，甚至可以按需组建自动驾驶汽车车队，比如通用汽车和莱福特正在组建的车队。

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They were heroes." Today the State Department has a program called Rhythm Road.

VOA: special.2010.06.21

But at the end of this tough road, state budgets, debt burdens, economy and currency will be back to a sustainable equilibrium.

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En route back to Santa Fe, we move along the Low Road (State Route 68) which backs up to the Rio Grande.

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Opposition politicians have called for the head of the state road-building agency GDDKiA to resign over the affair.

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