Variable Message Signs are electronic displays that play an important role in controlling traffic, providing drivers with real-time information that improves safety, enhances traffic flow, and keeps them informed.
They are also known as Variable Message Boards (VMBs), Changeable Message Signs (CMS), or Dynamic Message Signs (DMS), which are a ubiquitous sight on modern roadways.
Benefits of VMS?
These road safety solutions signs offer a bunch of advantages for both drivers and transportation authorities. Here's a glimpse into the key benefits:?
- Enhanced Road Safety: They can display critical information about accidents, lane closures, upcoming hazards, and weather conditions and allow drivers to make informed decisions, adjust their speed, and navigate potential dangers, ultimately reducing the risk of accidents.
- Improved Traffic Flow: By informing drivers about congestion, accidents, and alternative routes, they can help alleviate traffic jams and optimize traffic flow. This not only reduces travel time but also minimizes driver frustration.
- Real-Time Communication: Unlike static signs, VMS can be updated remotely, allowing authorities to disseminate real-time information about changing traffic conditions, emergencies, and public advisories.
- Public Awareness: They can be used for public awareness campaigns, displaying messages about Amber Alerts, missing persons, or upcoming events.?
Technologies behind VMS?
Modern VMS utilizes a combination of technologies to deliver clear and effective messages. Here's a summary of the essential elements:?
- LED Displays: They primarily use Light-Emitting Diode (LED) displays due to their high brightness, energy efficiency, and long lifespan. LEDs are visible even in harsh sunlight and can be dimmed for night-time viewing.
- Communication Systems: They can be connected to a central traffic management system via wired or wireless communication. This allows for remote programming and control of the displayed messages.
- Software Applications: Specialized software applications are used to create, schedule, and manage the content displayed on the VMS. These applications offer features like text formatting, symbol libraries, and animation capabilities.?
Types of Variable Message Signs?
VMS comes in various configurations to suit different applications. Here are the two main types:?
- Fixed VMS: These are permanently mounted signs installed along highways, bridges, and major intersections. Fixed VMS are typically larger and provide more detailed information.
- Portable VMS: These are mounted on trailers and can be easily moved to different locations. Portable VMS are ideal for temporary traffic control needs like construction zones, incident management, and special events.
A recent advancement in VMS technology is the emergence of Smart VMS. These integrate with traffic data collection systems and can display real-time information such as travel times, congestion levels, and optimal routes.
Applications?
VMS finds applications in a wide range of traffic control scenarios. Here are some prominent uses:
- Traffic Management: They are used to display information about accidents, lane closures, road construction, and detours. This helps drivers plan their routes and avoid congested areas.
- Incident Response: During emergencies, they can be used to provide critical information about accidents, hazardous spills, and evacuations.
- Amber Alerts and Public Advisories: They can be a valuable tool for disseminating urgent public information about missing persons, amber alerts, and weather warnings.
- Speed Enforcement: VMS can be used to display variable speed limits, encouraging drivers to slow down in hazardous conditions or congested areas.
Conclusion?
Variable Message Signs have become an indispensable tool for modern traffic management. By providing real-time information, VMS enhances road safety, improves traffic flow, and keeps drivers informed. As technology evolves, we can expect it to become even more sophisticated, integrating with intelligent transportation systems for a more connected and efficient road network.
