Which aircraft model is designated as ERJ 175?

The designation ERJ 175 refers specifically to a type of regional jet manufactured by Embraer, known as the Embraer 175. This aircraft is widely used in regional aviation for its efficiency and capacity to operate on shorter runways, making it suitable for a variety of passenger routes. Its design optimizes passenger comfort while providing good fuel efficiency, which is important for regional airlines.

The other aircraft models listed, such as the Boeing 737, Airbus A320, and McDonnell Douglas MD-80, are different families of commercial aircraft that serve different market segments and purposes. For instance, the Boeing 737 and the Airbus A320 are considered narrow-body airliners used for short to medium-haul flights, while the MD-80 operates similarly as a larger narrow-body aircraft. Each model has unique characteristics and configurations, distinct from the ERJ 175, which specifically identifies it with the Embraer family of regional jets.