The 197 test runs were needed for sighting issues for some barrow crossings on the route, then more 197 only stop boards can be installed to add to the other 197 only boards already on the route.Probably, there's some stop boards on the Borderlands line that have 197 rather than 230 on them.
My gut is 150s will remain in place until 197s take over, besides the potential for a brief period of 230s to prove they're not up to it.
The 230's are still grounded with no date for there introduction other than sometime this year ! There's no training or fueling etc taking place and no drivers assigned to the project at this moment in time.
