Micromax designs, manufacturers and installs LED based Variable Message Signs for Highway application. Variable Message Signs (VMS) are programmable traffic control devices that display messages composed of letters, symbols or both. They are used to provide information about changing conditions in order to improve operations, reduce accidents, and inform travellers. They may ask drivers to change travel speed, change lanes, divert to a different route, or simply to be aware of a change in current or future traffic conditions.

VMS's provide information about:

• recurring congestion
• non-recurrent congestion
• weather-related problems
• congestion due to special events
• routes
• speed restrictions, and
• other changing conditions or requirements.

The information displayed on VMS's can be classified as advice, warnings, guidance and other requirements.

The VMS will warn drivers of traffic problems such as the existence of a downstream incident, work zones, or hazardous road conditions, and provide some advice for the drivers. The VMS for the purpose of guidance will directly provide drivers with instructions on route selection, lane changes, diversions, etc.

The advisory message for a future event, such as a lane to be closed, can help drivers divert to alternative routes, or make decisions by themselves.
A major use of this type of message is speed control, when combined with speed measuring devices.