Maintaining safe speeds and being electric, self-driving cars would drastically reduce pollution levels and dependency on non-renewable fuels.

通过保持安全车速行驶和以电为动力，无人驾驶汽车可以大大降低污染程度，并且减少对不可再生能源的依赖。

The national nonprofit PeopleForBikes advocates for safer speeds, protected bike lanes, traffic reduction, and more inclusive road planning to make cities more bike-friendly.

国家非营利组织 PeopleForBikes 倡导更安全的速度，保护自行车道，减少交通，以及更具包容性的道路规划，使城市更适合自行车。

Using data from past accidents, researchers have worked to identify safe speeds.

研究人员利用过去事故的数据，努力确定安全速度。

For example, when driving around a curve, the navigation system in the vehicle needs to calculate the safe speed based on the map's information.

例如，车辆行驶在一个弯道上时，导航系统需要根据高精地图提供的信息，计算安全车速。

(6) if required, reduce down to a safe speed.

(6) 如果需要，降低至安全速度。

(b) Every vessel shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility.

(b) 每艘船舶均应以适合当时情况和能见度受限条件的安全速度行驶。

Rule 6 Safe speed Every vessel shall at all times proceed at a safe speed so that she can take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions.

规则 6 安全速度 每艘船舶应始终以安全速度行驶，以便能够采取适当和有效的行动避免碰撞，并在适合当时情况和条件的距离内停下来。