LED Variable Message Signs – Intelligent Traffic Management

Lane LED Variable Message Signs (VMS) are intelligent traffic facilities. The following provides a detailed introduction from the dimensions of their working principle, types, functions, advantages, and key points for installation:

Working Principle

  1.Information Reception and Processing: Connected to the traffic management system, they receive information from traffic flow monitoring devices, traffic police command centers, etc., such as traffic volume data, traffic accident information, and road construction conditions. This information is analyzed and processed by the internal processor to determine the content and instructions to be displayed.

  2.Display Control: Based on the processed information, the controller sends corresponding electrical signals to the LED display screen, controlling the on/off state and color changes of the LED beads. This enables the display of various texts, graphics, and symbols, informing drivers of road conditions ahead and driving requirements.

Types

  1.Gantry-Mounted LED VMS: Typically spanning overhead on expressways or urban expressways, covering multiple lanes. They can simultaneously display information to vehicles in multiple directions, suitable for major traffic hubs and sections, providing comprehensive traffic guidance and road condition information.

  2.Cantilever-Mounted LED VMS: Divided into High-Resolution and Low-Resolution types. High-Resolution signs are suitable for urban traffic, installed on a roadside pole with a cantilever arm positioning the display above the lane, providing detailed information to drivers at close range. Low-Resolution signs are commonly used on highways to display simple traffic guidance information.

  3.Single-Pole Mounted LED VMS: Relatively simple structure, supported by a single pole at the roadside. Primarily used to display basic traffic information such as speed limits and lane indications, suitable for sections with simpler road conditions.

  4.Composite LED VMS: Combine multiple display modes and functions. They can simultaneously display various information such as text, graphics, arrows, etc., meeting the information display needs in complex traffic environments. Often applied in bustling urban areas and high-traffic intersections.

Functions and Roles

  1.Lane Assignment: Clearly indicate the driving direction for each lane (e.g., left turn, straight ahead, right turn), helping drivers choose the correct lane in advance. This reduces lane-changing conflicts and traffic congestion at intersections, improving intersection throughput efficiency.

  2.Traffic Flow Regulation: Dynamically adjust the functional use of lanes based on real-time traffic flow data. For example, setting a specific lane as an inbound-only lane during the morning rush hour and an outbound-only lane during the evening rush hour. This better adapts to changing traffic flow patterns and optimizes road resource allocation.

  3.Road Condition Information Dissemination: Display conditions ahead such as congestion, accidents, or construction. This allows drivers to learn about road conditions in advance, prepare accordingly, and choose suitable alternative routes to avoid unnecessary delays.

  4.Speed Limit Reminder: Can replace traditional speed limit signs. Display reasonable speed limits in real-time according to different road sections and traffic conditions, reminding drivers to control their speed and ensure driving safety.

5.Special Event Notification: During special circumstances such as severe weather, road closures, or large-scale events, issue corresponding notifications and warning messages. This guides drivers to take appropriate driving actions, ensuring traffic safety and order.