Old version of the 'Steep Ascent Ahead' road sign in Botswana (1977-1993), but is now being replaced by File:SADC road sign W323.svg or File:SADC road sign TW323.svg.
This file was derived from: Singapore road sign - Warning - Steep ascent.svg:
Singapore road sign - Warning - Steep ascent.svg: Woodennature
derivative work: Fry1989