Product
CMS-T331 Full Size Portable Message Sign
3-Line / 8-Character Full Matrix Display
High-visibility, DOT-approved full size portable message sign engineered for highway operations, long-term work zones, special events, and crowd control. Built on AMSIG’s proven T300 Series architecture for consistent operation, durability, and cost-effective ownership.
Industry Applications
The CMS-T331 is widely deployed across environments where clear, reliable communication is critical.
DOT and Highways
Construction Zones
Municipalities and Public Works
Emergency Response
Special Events and Crowd Control
Transportation agencies and contractors rely on the CMS-T331 for its visibility, flexibility, and performance in high-traffic, high-exposure locations.
Product Overview
The CMS-T331 is a full size, trailer-mounted portable message sign featuring a 3-line, 8-character full matrix display. Designed for wide-shoulder and median applications, the CMS-T331 delivers exceptional legibility at long viewing distances and operational efficiency for agencies with diverse messaging needs.
As part of AMSIG’s T300 Series, the CMS-T331 shares common design, operating logic, and component architecture across multiple product sizes. This consistency improves safety for operators, simplifies training, and reduces long-term operational costs.
Automatic LED brightness adjustment ensures optimal visibility under all lighting conditions, from full daylight to nighttime operations.
Technical Specifications
A summary of key specifications should be displayed on the page, with full technical details available in the downloadable spec sheet.
Example highlights include display type, message capacity, brightness control method, power configuration options, and trailer compatibility.
Features and Benefits
Messaging and Visibility
The CMS-T331 supports extensive message storage and sequencing capabilities to manage traffic communications needs. The display supports pre-programmed messages, user-generated messages, and multiple sequences with up to 10 pages per sequence. LED brightness is automatically regulated through photocell control, ensuring maximum contrast and readability in all times.
Operational Efficiency
Built on AMSIG’s common T300 Series architecture, the CMS-T331 offers a familiar interface and operating experience across product sizes. This consistency reduces training time for operators and simplifies maintenance for service teams. The standardized design also supports easier fleet management for agencies operating multiple AMSIG message signs.
Durability and Performance
The CMS-T331 is engineered for long-term roadside deployment in demanding environments. Its construction is designed to withstand extended exposure to weather, traffic vibration, and temperature extremes while maintaining reliable performance and message clarity.
Compliance and Standards
The CMS-T331 is designed and manufactured to meet applicable transportation and safety standards. Compliance with industry and agency requirements ensures suitability for regulatory procurement and deployment.
Model Comparison
The CMS-T331 is part of a family of full size portable message signs designed to meet varying messaging needs while maintaining the same core architecture and reliability.
CMS-T331
- 3 lines
- 8 characters per line
CMS-T332
- 3 lines
- 12 characters per line
CMS-T333
- 4 lines
- 12 characters per line
All models share common operating logic, controls, and durability. Selection is based on message length, viewing distance, and application requirements.
Firmware, Security, and Longevity
The CMS-T331 operates on AMSIG’s WebExpress firmware, delivering ease of use, reliability, and NTCIP compatibility. WebExpress supports long-term serviceability, including over-the-air updates and upgrade paths that help extend the usable life of the sign.
AMSIG’s consistent firmware architecture ensures that the CMS-T331 remains compatible with evolving operational and communication standards.
Need Help Choosing the Right Configuration?
Selecting the right portable message sign depends on your environment, message requirements, and deployment conditions. AMSIG’s team can help evaluate your needs and recommend the most effective configuration.
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