Why the best traffic count can still be a poor billboard site
Many site owners focus on passing vehicles and forget that billboards are read in seconds. A busy road with high speed traffic can be better than a slower route with constant congestion, if drivers have a clean view corridor and enough time to take in the message. On the other hand, a site beside a queue, a bend, or a cluttered interchange may look busy on paper but deliver weak visibility in practice.
We start by testing what the driver actually sees from the road edge, the lane positions and the likely approach angle. In Johannesburg and Pretoria, that means checking how the sign works from a moving car in peak hour, after dark, and in wet weather. A site can change a lot when headlights flare, trees grow, or neighbouring developments go up.
- Count traffic, but also note speed and direction of travel
- Check whether the sign face can be read before the vehicle passes it
- Look for clutter from poles, bridges, trees and other signs
- Review both morning and evening movement patterns
View corridors decide whether the message gets seen
View corridor means the open line a driver has to the billboard. If that line is broken by an embankment, gantry, wall, building corner or heavy roadside planting, the sign loses value. We also look at the angle of the face to the road. A board that is too square to the traffic can be hard to read, while one that is twisted too far off line may lose impact altogether.
In Modderfontein and the northern suburbs, some sites look ideal because of the volume on the main route, but the road geometry may push the sign too far back or too low. That matters just as much as the panel size. For digital screens, the issue is even tighter because brightness, dwell time and frame transitions all have to suit the road environment and local bylaw limits.
- Measure the approach angle from each traffic direction
- Check for obstructions at vehicle height, not just from standing eye level
- Allow for future growth from trees, berms and nearby development
- Confirm whether night visibility will still work without glare
Safe structural positioning protects the site and the budget
A billboard is only valuable if it can be built and maintained safely. Structural position affects footing design, wind loading, maintenance access and the risk of damage from traffic incidents. If the structure sits too close to an edge, services corridor or drainage line, the build can become expensive or impossible once engineering starts.
We look at the full physical setting, including underground services, servitudes, drainage patterns and any nearby overhead lines. Coastal humidity in Durban also changes the detail on steel protection and fixings. Inland, the concern may be strong wind exposure on open corridors or dust build up around certain industrial routes. Good site selection should reduce long term maintenance, not create more of it.
- Allow space for foundations and safe erection access
- Keep clear of drainage channels, servitudes and buried services
- Plan for inspection access and future maintenance vehicles
- Match the structure type to the wind and corrosion conditions
Approvals can make or break a billboard location
Some of the best looking sites are not viable because the approval route is too difficult. Road reserve rules, municipality requirements, landowner consent and safety clearances all affect whether the sign can proceed. A site with excellent traffic exposure can still fail if the zoning, setback or road authority position is not workable.
That is why site selection and approval support should happen together, not one after the other. We check whether the location is likely to support the sign type, height and scale being considered. For Gauteng developments, this often includes careful coordination with the property owner, roads authority and local municipal processes before fabrication is committed.
- Confirm land ownership and permission to occupy the site
- Check road reserve, setback and height restrictions early
- Review whether the sign type suits the zoning and use of the property
- Reduce approval risk before drawings are finalised
A Modderfontein example: one site, two very different outcomes
We recently reviewed a roadside opportunity in the Modderfontein area where the client wanted a large-format board facing a fast-moving commuter route. On first look, the traffic numbers were attractive. But the site sat behind roadside planting, close to a curve and near existing street furniture, which would have reduced the read time and made the structure awkward to maintain. There was also a service corridor to work around.
By shifting the position slightly, adjusting the height and changing the orientation, the site became safer and more visible. The final outcome gave a cleaner view corridor, better maintenance access and less conflict with the surrounding infrastructure. The lesson was simple: a slightly smaller or better-placed sign can outperform a larger one in the wrong position.
This is the kind of practical call that matters for brands, developers and municipalities across Gauteng. The goal is not just to put up a sign, but to place it where it can do its job for years.
What we check before we recommend a billboard site
Billboard site selection needs both field work and technical judgement. We assess traffic behaviour, structure position, approval exposure and operational practicality before recommending a site for fabrication and installation. That helps clients avoid costly changes later, especially where the board is part of a larger rollout across several towns or provinces.
Our team looks at the site from a project point of view, not just a visual one. That means considering design development, structural coordination, approval support and maintenance planning at the same time. It also means thinking about load-shedding, lighting continuity for digital screens, and whether the location allows safe access when repairs are needed after hours.
- Road speed, traffic direction and read time
- View corridor, angle of approach and surrounding clutter
- Structural position, services, setbacks and maintenance access
- Approval pathway, landowner permission and municipal constraints
