In terms of the actual configuration in technology, that will be partly answered as part of the regulations. In terms of what we assessed for the configurations in our safety study, all of them had, first of all, a forward-facing camera as well as an inward-facing camera. In terms of the orientation of the locomotive, it was all forward facing.
Certainly to maximize information that's available, it's without question that a forward-facing locomotive with a forward-facing camera, inward-facing camera, would be the optimum set-up.