Billboards, street furniture, transit and place-based screens; how sites are priced, how audiences are estimated, and the municipal approval process behind every structure.
The Revised South African Manual for Outdoor Advertising Control (SAMOAC) forms the backbone of outdoor advertising control, setting a national framework for how municipalities regulate this public medium. Yet in August 2024, the City of Cape Town advanced its own standing when it issued a new Outdoor Advertising By-Law to replace the 2001 framework. Each billboard and street-level sign is governed by detailed, evolving local rules, not just commercial decisions.
In accordance with SAMOAC, responsibility for regulating outdoor advertising falls to municipalities, with each local authority's by-laws detailing the types, sizes and placement of permitted structures [REMOVE]. Cape Town, for instance, states that the City controls outdoor advertising and signage through a combination of by-law and supporting policy [16]. The City of Johannesburg similarly uses by-laws to designate areas of control for outdoor advertising, with limits on structure sizes classified according to these zones [17].
This regulatory overlay shapes each out-of-home ad from inception: a sightline seen every day but only achieved after a submission to local council through a municipal application process [REMOVE].
Across South Africa, cities set specific definitions, dimensions and positions for billboards and other large third-party signs. Cape Town's current by-law, for instance, specifies maximum luminance for illuminated advertising, capped at 1000 cd/m² for panels under 0.5m², with the limit declining as surface size increases [3]. Its 2001 by-law (now repealed) defined "billboard" as a board supported by a freestanding structure and larger than 4.5m². These could only be erected in "areas of minimum control", and specifications restricted height, spacing and proximity to intersections [4–5].
Johannesburg takes a similar approach, prohibiting freestanding advertising signs from exceeding 40m² in partial control areas and 120m² in minimum control zones, providing explicit size limits for each control category [7]. Detailed technical design is required for street name advertising, with rectangular panels typically measuring 1.0–1.68m² and requiring a clear height of 2.1m from road surface to the bottom of the unit [8].
Finally, Steve Tshwete Local Municipality sets a maximum 18m² and 7.5m height for electronic billboards, and a 6m² surface limit for smaller billboards on tower supports, attenuating with regulation as structure size decreases[9–10].
Municipalities also regulate formats smaller than traditional billboards, providing a framework that differ from classifications applied to large third-party structures.
In Cape Town, a range of sign and advertising applications require submission to the City, from third-party billboards to flat and projecting signs, locality-bound first-party signs, balconies and construction address plaques [6]. Similarly, Johannesburg specifies the dimensions (1.0–1.68m²) and installation details (2.1m clear height from the street) [8] of its street-name advertising signs. While Tshwane limits posters displayed on municipal infrastructure to A1 (841 × 594mm) or L1 (600 × 450mm) depending on the location category [15].
Minor as they may seem, these definitions determine the look of each city street.
South Africa's out-of-home advertising falls within a broad spectrum: from the smallest posters to large illuminated panels. The Road Traffic Management Corporation's 2020 review cites an exhaustive list of formats, from the 3.6x2.5m and 3x2 m panels at the smaller end, to the extensive 9m×6m (54m²) and 12x12m (144m²) at the other [11].
These dimensions inevitably translate into different viewing distances and optical requirements. Billboards are governed not only by by-laws, but traffic safety demands and the size of the panel itself. Cape Town's 2024 by-law specifies maximum luminances of 1000, 800, 600 and 400 cd/m² for illuminated panels smaller than 0.5m², up to those larger than 10m² [3]. Smaller signs pose distinct challenges: proportional to both content and by-law constraints.
The Out of Home Measurement Council (OMC) provides a foundation for audience calculation in South Africa. Structured with an Inventory Mapping System and Traffic Intensity Model, the OMC's methodology integrates location and panel details with the movement of people to estimate audience volumes [12].
The OMC's ROAD guidelines acknowledge provincial population differences and enable assessment of roadside OOH formats in all areas, providing a basis for regional OOH audience volume [13]. Building on that foundation, Provantage released an initiative which tracks brand visibility in places, ProTrack, to offer a continuous measurement for place-based media [14].
A resolution of structural and demographic data, measurement transforms visible public spaces into intangible audience numbers.
The regulations that manage visibility mandate visibility. Cape Town requires advertisers to submit applications for a wide range of formats, including billboards, flat and projecting signs, locality-bound and farm signs, sky signs, roof signs, verandah and balcony signs, boundary wall and construction site signs, aerial and transit signs before operators may erect the structure [6]. Steve Tshwete necessitates written approval for both electronic and small billboards and tower structures, limiting sizes proportionally [9–10].
Behind each zoning definition and size limit lies a process of application, assessment, certification and approval [REMOVE].
The heavily regulated format of outdoor signs in South Africa stands in contrast to a market in rapid evolution: from ancient walls turned to commercial possibilities, the earliest confirmed advertisement appearing in antiquity. And against centuries of disruption and emergent platforms, OOH advertisers face an evolving roadmap.
A billboard's simplicity masks the countless local by-laws undergirding rules for its structure. It's the regulations that allow billboard operators and advertisers to exist at all.
As SAMOAC forms the broad framework for outdoor advertising at the national level, Cape Town, Johannesburg, Steve Tshwete and Tshwane's by-laws set the specifics for billboards, street furniture and other formats in each municipality, with stringent requirements for both the application and certification process.
Then there's the OMC's inventory mapping and traffic intensity data, a new currency for audiences based on measured fact rather than best guess.
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