Key Takeaways
- Match the board to the environment: the size A VMS board is the smaller of the two trailer units, ideal for tight urban streets, retail centres and events, while the size C VMS board is the larger unit, built for high-speed roads, major works and motorway-scale visibility. These models are suited for different environments and businesses, offering versatility for contractors, municipalities, and event organisers.
- Pixel pitch defines clarity at distance: size A runs a 20 mm pitch (48 x 80 resolution), size C runs a 25 mm pitch on a much larger 56 x 96 panel with brightness greater than 12,400 cd/m², so the size C reaches further while staying legible in direct sunlight. Both models deliver high visibility with vibrant colours and clear displays for effective road management and safety.
- Both boards are full-colour, solar-powered and engineered to cut power consumption by up to 70%, with AGD radar fitted as standard, 4G remote control and GPS tracking on every INNOV8 unit, ensuring excellent energy efficiency.
- Boards meet Australian Standard AS4852.2-2009, are built to Australian standards, and all models comply with these standards for safety and operational requirements. They are built on galvanised steel trailers, and sit inside a wider VMS range that includes the VB Video Trailer, vehicle-mounted VMS and Variable Speed Limit Signs for projects that need something different again.
Choosing the Right Board Starts with the Site, Not the Spec Sheet
Variable Message Signs are one of the most cost-effective safety controls in modern traffic management, especially when tailored to specific needs and suited for managing traffic for businesses and other organisations. A board that is too small disappears into the background on a freeway. A board that is too large dominates a suburban verge, blocks sight lines and costs the project budget it didn’t need to spend.
At INNOV8 Equipment, our two flagship trailer-mounted units, the size A VMS board and the size C VMS board, represent models designed for different applications and can be set up to meet the specific needs of various businesses. Picking between them is the first call most traffic management planners, civil contractors and event organisers need to make. This guide walks through how to choose, what each board is engineered for, and where the rest of our VMS range fits in.
The Size A VMS Board: Built for Urban Agility
The size A VMS board is the smaller of our two trailer-mounted variable message signs. Its compact footprint is what makes it useful. It fits onto nature strips, kerbsides, retail forecourts and event entrances where a larger trailer would be a logistical headache.
Because of that, the size A is our most versatile general-purpose board, used regularly for local roadworks, business announcements, and is suited for businesses needing dynamic, high-visibility messaging, including opening-hours changes and event wayfinding.
Despite the smaller frame, the technical specification is anything but lightweight. The size A is a full-colour LED display with a 20 mm pixel pitch and a 48 x 80 pixel resolution, sharp enough for vibrant text, logos, graphics, and animations to enhance message visibility and effectiveness.
It is fitted with 220 W solar panels and an energy-efficient design that cuts power consumption by up to 70% without dropping brightness, so the board can run continuously on solar with no generator and no daily intervention. Maintenance free batteries support continuous operation, making the board reliable and environmentally friendly for sustainable traffic management.
Beyond the display, the size A includes the same control fabric you’ll find across our fleet: SMS programming, GPS tracking, 3G and 4G remote control, integrated light and temperature sensors that adjust brightness automatically, and a hydraulic mast that lifts the head into position.
The trailer itself is galvanised steel, modular at the optical lens, and is engineered to be easy to maintain on a depot floor. The trailer-mounted, solar-powered design allows for easy transportation and setup, enabling quick deployment at construction sites or events. In short, if your work sits in 60 km/h zones, in retail and commercial precincts, at festivals, or anywhere the trailer needs to tuck neatly into a small footprint, the size A is the right starting point.
The Size C VMS Board: Built for the Open Road
The size C VMS board is the larger of the two and is designed for one thing above all else: legibility from a long way away. On a motorway or major arterial, drivers need to digest a safety message at speed, well before they reach the hazard. The C size is specifically engineered for high visibility, designed to stand out in high-speed environments and challenging weather conditions, ensuring compliance with Australian standards. That is what the size C is built to do.
The cabinet measures 1,600 mm high by 2,600 mm wide by 120 mm deep, with a 56 x 96 pixel resolution and a 25 mm pixel pitch. Brightness is rated at greater than 12,400 cd/m², which means messages stay crisp and legible in full Australian sun. To support that screen, the size C is fitted with 450 W solar panels and 600 Ah deep-cycle batteries, paired with auto-brightness control so the display steps down at night and back up at noon without anyone touching it.
Where the size C really separates from a typical motorway board is in its operating tools. It ships with the MC20 handheld touch-screen controller for on-site updates, and the same web-based 4G remote-control suite for office or in-vehicle programming, allowing the board to be programmed and managed remotely.
Pixel diagnostics are built in, meaning the system reports any failed LEDs straight back to the operator so messages stay compliant without sending a tech to site. The structure itself is hot-galvanised steel, anti-corrosive and designed to be cleaned down easily in the case of graffiti or road grime. If your project sits on a freeway, a high-speed arterial, a major roadworks site, or anywhere the message needs to reach drivers travelling at 80 to 110 km/h, the size C VMS board is the unit specified for the job.
Size A vs Size C at a Glance
The headline differences between the size A VMS board and the size C VMS board are easy to summarise, with different models available including colour VMS and full colour VMS boards to suit a range of applications. The size A suits urban roads, events, retail and business use, with a 48 x 80 pixel display, a 20 mm pitch and 220 W of solar power feeding maintenance-free deep-cycle batteries.
The size C suits motorways, major arterials and large works, with a 56 x 96 pixel display, a 25 mm pitch, brightness greater than 12,400 cd/m², 450 W of solar capacity and a 600 Ah deep-cycle battery bank. Both are full-colour, both ship on a galvanised steel trailer, and both are certified to AS4852.2-2009, using the highest quality materials for durability and reliability.
VMS boards can display messages in various formats, including letters, symbols, and animations, and are available in single-colour or multi-colour configurations.
What Both Boards Share
Whether you choose a size A VMS board or a size C VMS board, the core safety and control features are identical. Both are full-colour, both are trailer-mounted on galvanised steel, both are solar-powered with maintenance-free battery storage, and both are designed to operate 24/7 in remote locations without grid power.
Every INNOV8 trailer ships with AGD Radar as standard, which lets operators pair a real-time vehicle-speed display with a triggered warning when a driver exceeds the limit. Data analysis is also available, so the radar data can be reviewed afterwards to inform speed-management decisions on the same site or future sites.
Every unit is also fitted with GPS tracking and 4G remote control, so messages can be updated from any internet-connected device and the trailer’s location is always visible to the operator. In addition to remote programming, VMS boards can also be programmed locally using a removable or fitted on-board keyboard tablet, allowing direct message input. Our team can assist with delivery, installation, configuration, and ongoing support to ensure smooth operation and user satisfaction.
Both boards are built to Australian Standard AS4852.2-2019, which governs luminance, contrast and chromaticity for variable message signs in this country. That single specification is the difference between a board that holds up under a state road authority audit and one that doesn’t.
When Neither Size A nor Size C is the Answer
The size A and size C trailers cover the vast majority of project types, but they aren’t the whole range. There are three other tools in the kit worth knowing about.
For full-motion video, advertising and event work, the Video Board Trailer uses a much finer pixel structure for fluid imagery, ideal where you need to communicate something more emotive than a Slow Down instruction. These dynamic displays can enhance communication for events and advertising by adapting messages in real time to suit changing needs.
For rolling work zones, where towing a trailer is a liability, vehicle-mounted VMS boards integrate the display directly onto the back of a traffic control ute or truck and can be deployed and re-positioned in seconds. For pure speed regulation, where the only message that matters is the legal limit, Variable Speed Limit Signs (VSLS) sit neatly in the verge and let an operator drop the limit the moment a crew steps onto the bitumen.
Each of these sits beside the size A and size C in the wider INNOV8 lineup, and the right combination on a complex job is often more than one type of board working together. For example, a VMS board can be programmed to display Fire Danger Ratings or notify the public about upcoming events, demonstrating its versatility in real-world scenarios.
How to Make the Call on Your Next Project
The cleanest way to pick a board is to work towards from the site. Start with the operating speed. Add in the available footprint at the deployment point. Add in the message complexity, whether you need text only, text-with-logo, or full motion. Finally, factor in the project duration and how often the message will change.
In most cases, the answer narrows quickly. A 50 km/h CBD street with a short-duration roadworks job almost always lands on a size A VMS board. A 100 km/h highway upgrade with a long-running closure almost always lands on a size C VMS board. The middle ground, an 80 km/h arterial with a tight verge, is where it pays to talk to a specialist.
INNOV8 Equipment is Australian owned and operated, services across Australia and New Zealand, and our team can scope your project and recommend the right board configuration to assist with your specific needs, including installation, configuration, and ongoing support, whether you need a single trailer or a co-ordinated fleet across multiple sites.
Ready to size up your next project? Contact our team on 1300 071 007 and we’ll help you pick the right VMS board for the job.
Variable Message Signs FAQs
Does every INNOV8 VMS board come with radar fitted, or is it an optional add-on?
Radar is standard, not an upgrade. Every INNOV8 Equipment VMS trailer ships with AGD Radar as part of the base build, and data analysis is available so the radar information can be reviewed and used to inform future site planning.
How many characters can I actually fit on a VMS slide?
As a working rule on our boards, you can run up to 10 characters per line including spaces, and up to 4 lines per slide. For moving traffic we recommend keeping the slide deck to no more than 7 or 8 slides; pedestrian-facing displays can comfortably carry more.
How long should each slide stay on screen?
Standard timing for 1 to 3 lines of text is roughly 2 seconds per slide. For 4-line slides or any flashing slide, 3 seconds is the comfortable read time. Longer dwell times can be set if your message needs them.
Can I add my own logo or custom graphics to the board?
INNOV8 offers custom design services for logos and pictures, so the message displayed on either a size A VMS board or size C VMS board can be branded or visually enhanced rather than text-only.
Is the size A VMS board capable of full video, or only static text?
The size A VMS board is a full-colour LED display with a 20 mm pixel pitch, designed to handle full-colour video and advertisement content as well as standard traffic messages. For high-detail full-motion video at close range, the Video Board Trailer is the unit purpose-built for that use case.