> Bored subways are imperceptible from above ground. Not entirely true - the Crossrail in London goes under the Barbican arts centre, and that section of the t

> Bored subways are imperceptible from above ground. Not entirely true - the Crossrail in London goes under the Barbican arts centre, and that section of the track has special floating tracks to reduce noise and vibrations: http://www.crossrail.co.uk/construction/railway-systems/ http://www.crossrail.co.uk/construction/railway-systems/