美国的交通规则涵盖了各个方面，以下是一些关键的规定：首先是驾驶人必须懂得在哪些情况下要让行，比如交叉路口中的让行规则，以及当有行人或者其他车辆在人行横道或者十字路口时该如何处理。
其次，驾驶人必须按照指定的限速上路，这是为了确保道路安全。
此外，在美国，驾驶人还必须遵守不同道路标志和标线的指示，比如禁止标志、停车标线等等。
另外，对于驾驶人来说，酒驾是严禁的，在美国酒驾会受到严厉的处罚，因此，驾驶人必须保持清醒的状态。
最后，对于乘坐汽车的乘客来说，系好安全带是必须的，无论是前座还是后座。
这些规则的主要目的是确保道路上的交通安全，驾驶人必须遵守这些规则以确保自己和其他人的安全。
The traffic rules in the United States cover various aspects. Here are some key regulations: Firstly, drivers must know when to yield, such as the right-of-way rules at intersections and how to handle situations when pedestrians or other vehicles are present. Secondly, drivers must adhere to designated speed limits to ensure road safety. Additionally, in the United States, drivers must follow the instructions of different road signs and markings, such as prohibition signs, stop lines, and more. Furthermore, drunk driving is strictly prohibited, and offenders face severe penalties in the United States, so drivers must maintain a sober state. Lastly, wearing seat belts is a must for passengers in a car, whether seated in the front or rear. The main purpose of these rules is to ensure traffic safety on the roads, and drivers must comply with them to ensure their own safety and the safety of others.