When talking about the definition of high speed railway, it is often said 初期运营速度不小于200公里/小时. I don't understand what 初期运营速度 mean? I come out a few possible meanings, but not sure which is correct.
Option 1: The designed speed (if so, it implies the real running speed might be either faster or slower)
Option 2: the speed of early stage (if so, it implies there will be a later stage of this railway and in later stage the running speed will be either faster or slower.)
Option 3: the starting speed when a train departs from the railway platform.