Decreasing-radius corner
A decreasing-radius corner tightens as you go through it, so the exit is sharper than the entry and catches out drivers who enter too fast.
Also called: tightening corner
Most corners open up on the way out. A decreasing-radius corner does the opposite: it gets tighter as you go, so the exit needs more steering than the entry. It is a classic trap, because the first part looks fast and invites you to carry speed that the second part cannot accept.
The usual approach is a later turn-in and a late apex, with patience. Keep some braking going into the corner, or at least stay off the throttle, so the front tires remain loaded while the radius closes. Look far around the bend, toward where it tightens, rather than at the inviting first section.
If you enter too fast, the car runs wide toward the exit curb and the instinct is to add steering and lift sharply. Adding steering past the grip limit just scrubs the fronts, and an abrupt lift can trigger lift-off oversteer. Accept a slower lap, ease off gently, and carry the lesson into next lap's entry.
Misjudging a tightening corner is a common cause of off-track excursions, and patience on entry is usually faster as well as safer.