You should always come to a complete stop when entering a highway even when there is no STOP or YEILD sign?

No, you should not always come to a complete stop when entering a highway if there are no stop or yield signs. Instead, you should merge onto the highway when it's safe to do so, allowing you to match the speed of traffic and maintain safety. Stopping unnecessarily can create dangerous situations for both you and other drivers. Always be aware of traffic conditions and follow the rules of the road.