Crossrail is a well-done project. But just to be clear: there were fully 68 years of feasibility and planning studies prior to getting the funding for construct

Crossrail is a well-done project. But just to be clear: there were fully 68 years of feasibility and planning studies prior to getting the funding for construction. Since then, it's been laudably smooth sailing -- but if one considers the pre-construction planning work, there's substantial room for improvement.