Final answer:
When getting on the expressway, it is important to check for a gap in traffic, signal and accelerate to the speed of traffic, and merge smoothly into traffic.
Step-by-step explanation:
When in the acceleration lane getting ready to get on the expressway, it is important to do all of the above:
Check for a gap in traffic to ensure it is safe to merge.
Signal and accelerate to the speed of traffic so you can smoothly merge without causing any disruptions or obstacles for other drivers.
Merge smoothly into traffic, making sure to yield to other vehicles if necessary.