South Africa, April 29 -- South Africa now has roughly 16,200 billboard faces, with steady growth over the past six months, and digital inventory expanding even faster, with roadside screens up around 10% year-on-year. But most of that growth continues to concentrate in Gauteng, where new sites are added to an already dominant base.

That concentration is clear when you look at how inventory is distributed. Gauteng holds around 54% of the country's billboard stock, while the Western Cape sits at roughly 9%. In digital out of home (DOOH), the gap is just as stark, with over 500 roadside screens in Gauteng compared to just over 80 in the Western Cape.

Yet the economic picture tells a different story. Gauteng contributes around 34% to natio...