What does a "slow train" mean in operational terms?

The term "slow train" in operational terms primarily refers to a train that operates at lower speeds. This designation can involve several factors, including the train's route, the types of stations it serves, and the limits imposed by rail infrastructure or safety regulations. A slow train typically prioritizes making more stops along its route, which is more aligned with serving densely populated areas or local passengers rather than achieving high speeds.

While acceleration might be a factor in how quickly a train can reach its operational speed, the essence of a "slow train" relates to its cruising speed and overall operation speed rather than how it accelerates. A train can still have an efficient acceleration process but maintain a slow overall operational speed due to other factors.

In contrast, frequent stops and lower speed can sometimes coincide, but they are not the definitive characteristics defining a "slow train." Mechanical issues would lead to different classifications and operational assessments entirely. Thus, identifying a slow train primarily revolves around its lower operational speed.