Traffic conditions can change in seconds due to accidents, road construction, severe weather, or unexpected congestion. To keep motorists informed and improve roadway safety, transportation agencies rely on Variable Message Signs (VMS) to deliver accurate, real-time information exactly when and where it's needed.
Unlike traditional static road signs, Variable Message Signs allow agencies to quickly update travel information, warn drivers of hazards, and guide traffic around incidents. These electronic signs have become an essential part of modern traffic management systems, helping improve mobility while reducing delays and improving public safety.
At Signals On The Run, we provide Variable Message Signs, traffic signal equipment, Intelligent Transportation Systems (ITS), traffic detection solutions, and installation support for municipalities, contractors, and transportation agencies throughout Lincoln, Maine, and communities within a 200-mile radius.
Quick Answer: What Are Variable Message Signs?
Variable Message Signs (VMS) are electronic traffic signs that display real-time information to motorists. They communicate traffic conditions, lane closures, construction updates, travel times, weather alerts, and emergency messages, helping drivers make informed decisions and improving overall roadway safety.
How Variable Message Signs Work
Variable Message Signs connect to transportation management systems through wired or wireless communication networks. Traffic management personnel can update messages manually, while many modern systems automatically display information based on real-time traffic data collected from detection systems, roadway sensors, and traffic cameras.
Depending on the application, VMS can display:
- Traffic congestion alerts
- Road closure notifications
- Detour information
- Construction updates
- Weather warnings
- Incident notifications
- Travel time estimates
- Emergency alerts
- Lane closure information
- Speed management messages
Providing drivers with timely information allows them to react more safely and choose alternate routes when necessary.
Benefits of Variable Message Signs
Transportation agencies continue investing in Variable Message Signs because they improve both safety and traffic operations.
Improved Roadway Safety
Real-time warnings help drivers prepare for changing roadway conditions before reaching an incident area, reducing sudden braking and last-minute lane changes.
Better Traffic Flow
When motorists receive advance notice of congestion or road closures, they can choose alternate routes, helping reduce traffic backups.
Faster Incident Management
During crashes or emergency situations, agencies can immediately notify motorists about detours, lane closures, or hazards, improving overall traffic management.
Support for Work Zones
Variable Message Signs are commonly used in construction zones to warn drivers about reduced speed limits, lane shifts, and upcoming work activity.
Enhanced Public Communication
Transportation agencies can communicate important travel information without installing permanent static signs for every situation.
Types of Variable Message Signs
Different roadway environments require different types of VMS solutions.
Common options include:
Permanent Variable Message Signs
Installed above highways or along major roadways, these signs provide continuous traffic information throughout the year.
Portable Variable Message Signs
Mounted on trailers, portable VMS are commonly used for temporary construction projects, special events, emergency response, and planned road closures.
Full-Matrix Displays
These signs can display custom text, symbols, graphics, and lane control information, providing greater flexibility than older character-based systems.
Integration with Intelligent Transportation Systems
Variable Message Signs are an important component of
Intelligent Transportation Systems (ITS).
They often communicate with:
- Traffic signal controllers
- Radar traffic detection systems
- Video traffic cameras
- Connected vehicle infrastructure
- Central traffic management software
- Weather monitoring stations
- Emergency management systems
This integration allows transportation agencies to automatically display relevant information based on changing roadway conditions.
