Mauritius warning signing includes a 'sharp deviation of route' panel, a bold arrowhead board placed on the outside of a severe change of direction. It tells you:

1. That an extra overtaking lane opens up around the bend
2. Which way the road turns sharply, so you should slow early and follow that line
3. That a lay-by for parking is provided on the bend
4. That the bend is engineered to be taken safely at the open-road limit