The lateral portion of a vehicle situated on the same side as the driver when facing forward is commonly referred to as its right side in countries where traffic keeps to the left. Conversely, in nations where traffic keeps to the right, this section is considered the passenger side. For example, in the United States, if an individual is standing in front of a car facing it, the area to their left is the designated passenger area.
Understanding this spatial relationship is crucial for clear communication regarding vehicle location and direction, particularly in emergency situations or when providing instructions. Historically, the standardization of road rules and vehicle design has reinforced this understanding, aiding in traffic management and safety protocols. Accurate identification prevents misunderstandings and contributes to a more efficient transportation system.