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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Accurate statistics are crucial for understanding the state of road safety and measuring the impact of efforts to improve it.

准确的统计数据对于了解道路安全状况以及衡量道路安全改进工作具有的影响至关重要。

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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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What both the Fatah road map to the two-state solution and the Jordanian road map to the two-state solution show quite clearly is that there is no two-state solution.

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