Variable message signs (VMS) are programmable displays that display messages composed of letters, symbols or both. Variable Message Signs are widely applicable as highway and traffic control equipments. They are generally used to convey the following messages.
- Recurrent and Non-recurrent congestion
- Weather-related problems
- Congestion due to special events
- Route selection, Lane Changes, Diversions
- Speed restrictions
- Hazardous Road Conditions
- Advisory message for a future event
- Speed control
- Other changing conditions or requirements
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