If the speed limit is set at 55 units (e.g., 55 miles per hour or 55 kilometers per hour) and you accelerated until you reached exactly 55 units, you would not be considered speeding. By maintaining a speed that is equal to the posted speed limit, you are abiding by the legal requirements and not exceeding the speed limit. It is important to note that exceeding the speed limit, even by a small amount, can be considered speeding and may result in legal consequences or fines. It's always advisable to drive within the speed limits to ensure your safety and the safety of others on the road.