Final answer:
When waiting to merge into traffic, you should wait for a large enough gap and merge gradually to reach the speed of traffic.
Step-by-step explanation:
When waiting to merge into traffic, it is important to wait for a large enough gap before merging. This means that you should not try to merge if there is not enough space for your car to fit safely. Pulling out slowly and gradually reaching the speed of traffic is also important to ensure a smooth and safe merge. Driving on the shoulder of the road until you reach the speed of traffic is not a safe or legal option.