Complex sentence: Telford himself had proposed a completely alternative route, running to Spean Bridge via Loch Treig and Glen Spean, but his plans were never implemented, though that route eventually formed part of the West Highland Railway, which remains the case today.
Split into simpler sentences: Telford himself had proposed a completely alternative route, running to Spean Bridge via Loch Treig and Glen Spean. His plans were never implemented, though that route eventually formed part of the West Highland Railway, which remains the case today.