Brusio spiral viaduct and railway (Switzerland, built 1908), from above:
More or less every transition curve on the Autobahn is some sort of clothoid.
You only really notice them at the on- and off-ramps which have small radii (and are designed for ~40 km/h).
One of the reasons for using clothoids is that changes in direction are smooth, not sharp turns, which works beautifully with large radii.
