When road maintenance or construction companies are fixing roads, they need a way to talk to drivers. Because they want to keep people safe and tell them what is happening. The reason is there are workers and big machines on the road and their safety is also very important.
You might have noticed, sometimes roads are closed & traffic needs to slow down near a work zone. That’s when these companies use special variable message signs to give clear messages. These signs can inform drivers to stop, go slower and take another way. As a result, accidents are prevented and also the traffic keeps moving.
So, if you are a city planner, manage road construction, or work in municipal authority, this guide is for you. We will explain the basic meaning of VMS, its types, and how different variable message signs work. You will also learn several uses of variable message signs and how you can choose the best VMS for your next project.
What Are Variable Message Signs?
Variable message signs are special electronic boards that you mostly see on roads. Traffic control management put these sign boards to show important messages and graphics while you drive. Without these boards, you will probably face some critical issues when you are riding on the highway.
For instance, you could crash with other vehicles if you are not aware of earlier accidents or traffic jams. Therefore, when we travel on roads, they tell us about traffic flow, accidents and new routes. These signs can also change anytime to give new updates. No matter if it is day or night, they can operate in all kinds of situations plus weather.
How Does a Variable Message Sign Work?
Well, the whole process of variable message sign boards is controlled from a central place by traffic workers or automatic systems. This system collects data from cameras, weather stations and sensors so that they can be updated in real time & quickly respond to changes in road conditions.
Additionally, VMS uses LED or LCD panels to show text, symbols, graphics, and simple animations.
6 Common Types of VMS
There are many variable message sign specifications. But, you will understand them better if you read these following types.
1. Portable Variable Message Signs
They are also called mobile variable message signs. As the name shows, these signs boards can be moved from one place to another. You can use them for road work or temporary events as well. Portable variable message signs can be quickly set up where needed to guide/warn drivers about the closed routes.
2. Fixed VMS
On the other hand, fixed variable message signs stay in the place where they are installed once. Furthermore, these are also electronic boards that you put in one spot on roads or highways. You will stay informed about traffic, weather & road problems with the help of fixed VMS.
3. Full Matrix
The main aim of the full matrix is to show text, symbols, and simple pictures across the whole screen. As a result, people can clearly observe the city road situations and all things that are happening in real time. We suggest you use this particular VMS if you need more space & flexibility to show different types of updates.
4. Solar Powered Variable Message Signs
If we talk about solar-operated VMS, they are more suitable for remote areas where electrical connections are not available. These variable signs get power from the solar panels which makes them sustainable and affordable options among other types.
5. Line Matrix
Line Matrix VMS focuses on clear and simple messages with only a few lines of text. This specific format makes it easy for you to read the given information. Regarding its application, these are ideal for locations where clear and direct communication is important (especially in dangerous areas).
6. AI-Integrated Variable Message Sign
Basically, AI VMS are advanced artificial intelligence-based systems. They mostly perform AI analysis, such as collecting traffic data and predicting traffic jams. You can change the messages on the signs based on road conditions. The best part is that they can automatically change speed limits and warn drivers about upcoming hazards without human input.
How To Install and Operate Variable Message Sign?
Power Sources (Solar, Battery, Electric)
During the installation of VMS, the very first thing to consider is its source of power. This source can be of 3 types such as solar, battery and Electricity.
- If you want to use solar energy, then it is an environment-friendly and budget friendly option. Moreover, its process of fitting is also very simple. You just need to place solar plates and connect them with the circuit of the variable message sign board.
- Now, think about the area which doesn’t have an electricity and solar option. Then battery powered boards are the solution. This option is more flexible for you. What you have to do is to charge the battery and make a connection between board and battery.
- Electric-powered boards are best for long term usage of variable signs. If you are placing the sign board at a very busy road, then this option will appeal to you more as compared to solar and battery.
Mounting Options
- Mobile or Trailer VMS are flexible ways to share information like warnings and alerts. They are perfect for temporary situations such as roadworks, traffic changes and local events.
- Vehicle mounted variable sign is specially designed to provide a clear and grabbing overhead view. You can easily operate it from a vehicle. Its efficient LED modules offer good coverage in both parked and in motion conditions.
Compliance Regulations For VMS
Common legal standards for variable message signs are usually set by national and regional transportation authorities.
However, MUTCD is a guide that exactly defines the rules. It’s about how you can place variable signs on the roads.
Placement Rules: VMS should be placed outside the clear recovery zone. It is at least 6 to 10 feet away from the edge of the travel lane (existing sign should not be blocked). In addition, it must be positioned at a minimum height of 7 feet if you are going to place it on sidewalks.
Movable Display Signs (MUTCD 6F.60): 6F.60 Section says: portable & changeable message signs (18 inches tall) should only be used for traffic control purposes. So, you should never try to show any commercial or unrelated data.
According to section 2L, information should have no more than 3 lines. Plus, VMS warnings must be easy to read for drivers from at least 800 feet away. You can also make sure each phase is displayed for 2 seconds.
Illumination and Visibility: Well, the most noticeable thing is that the LED display that you install should change brightness level automatically. It has to be visible if it is day or night (even bad weather).
Authority Approval & Permit Requirements: Before installing variable message sign boards, you need permission from the Department of Transportation (DOT) and local authorities too. We also suggest you get a Right-of-Way (ROW) permit to place it on or near public roads.
You Should Avoid These Common Violations
You must stay away from these four main mistakes during VMS installation.
- You should not use VMS for advertising or promotions, as it’s a 6F.60 regulation breach.
- Don’t display messages that are too long or require multiple cycles to read.
- If we talk about nighttime use, not adjusting the brightness of the LED display can be a problem as well.
- In addition, you should never place your variable sign too close to intersections and in areas that are not approved.
Benefits of Variable Message Signs
LED Display Technology
As you know, VMS uses an LED display. This feature makes the text more clear and brighter even at night time. These screens are specially designed to grab the attention of drivers quickly from a distance.
Low Power Consumption
Variable message sign is an energy efficient gadget. Its LED technology requires less power then traditional sign boards. That’s why you can use it in areas with multiple sign boards. So, you don’t need to worry about the high electricity bills.
Real Time Information Updates
Suppose there is an immediate alert notification for drivers like traffic jams, road closures and weather conditions. Then VMS will provide updated information due to its remote control system. This feature reduces confusion and allows drivers to make a good decision.
Weather Resistant
These sign boards are manufactured with durable and strong material. So, they can handle all weather conditions like rain, snow and heat. Moreover, this technology also ensures the high visibility of text in all these scenarios.
Remote Control
As you know, we can control variable message sign boards via a computer or mobile phone from a far off location. So, you can change and update the information easily. This thing will save your time and efforts.
Traffic and Public Safety
VMS helps in making roads safer to drive. Because they show notifications about the flow of traffic and weather alerts. These notifications reduce the accident ratio and hence the road is secure for drivers and passengers.
Law Enforcement
These boards also help in situations when you need to update the public immediately. They can be used for emergency warnings and alerts about cases like child abduction, murder, kidnapping & accidents, etc.
Practical Applications of Variable Message Signs
- Traffic Congestion Alerts: With the help of variable signs, drivers can easily identify which routes have slower traffic and which ones are clearer. This real-time information allows them to make quicker decisions.
- Roadwork and Construction Warnings: If there is any type of construction activity in progress, then variable message signs will show the drivers basic guidelines to follow.
- Hazard Notifications: In case of any shattered pieces, sudden accident and slippery roads, these signs boards are a trustable source for notifying drivers about sudden weather changes.
- Lane Usage Updates: If there is an excessive traffic flow, then these boards can alert drivers about the best lane to choose.
- Event Management: For large public events like sports and cultural festivals, VMS boards provide important information. For example: parking place, proper directions and event timings.
- Alternate Route Information: When the traffic is slow or the road is blocked, variable message signs inform about the alternative routes that can be beneficial for the public.
- Emergency Flood Warning: In flood areas, VMS are mostly used for warning the drivers about flood conditions and suggest more suitable options to choose.
5 Recommendations By Jackwin To Select Right VMS For Your Project
As a top provider of roadway safety and parking equipment in China, JACKWIN has a lot of experience in this field. From what we have learned, here are some helpful tips for you to choose the best variable sign product according to your project needs.
Location & Purpose
During the selection of the right variable message sign for your projects, it’s important to consider where it will be placed. You should also consider the specific objectives. Because the location will determine the size and type of sign you need.
However, if you are still not sure about the option, then for highway use go for full matrix & in urban zones choose line matrix VMS accordingly.
Sign Size and Viewing Distance
We will suggest you pick the board size based on how far away drivers will be. Reason is that, the larger the display, the easier it is to read from a distance. Make sure the sign you are buying is big enough to be visible for drivers at different speeds too.
Message Capabilities
Well, in urgent or high traffic situations, people need to understand the message quickly. Because rapid action is required for such scenarios. So, we will advise you to make sure text, symbols and graphics are enough to deliver a clear and meaningful message.
Control System
Another critical aspect of variable message sign is the brain (control system) that decides how the lights show messages and images. We recommend you to wisely select the VMS which has an excellent functional control system. You can talk to our team and we will give you free consultation.
Power Source
Power source decides how fast your equipment will run. So keep in mind the voltage supplies (electricity, solar power) and then purchase variable message signs. Otherwise wrong power input can create faults and become risky for you as well.
Wrapping It Up
Now we can say after reading this guide, you have got all the necessary information about variable message signs. We recommend you take good care of official MUTCD guidelines while installing these signs so you don’t do any violations.
Jackwin is a top Chinese manufacturer & supplier of variable message signs. We have been exporting products to several global locations for the last 18 years. Our R&D engineering team produces waterproof, customizable and european standard variable signs for you. Contact us today to get your quick quote.
