changeover

noun

Etymology: Etymology tree English change overdeverb. English changeover Deverbal from change over.

1. A conversion or transition from one thing to another.

   “The train runs slowly with frequent slacks for bridge and culvert repairs. At one point occurs the changeover from left- to right-hand running.”

   “Changeover from diesel to electric power can take place at any time while the locomotive is running and does not involve stopping the train.”