The solar-powered multifunction speed limit sign integrates many functions for real-time traffic and general information. The display has been designed to minimize power consumption and can be powered with a photovoltaic panel, eliminating the need to excavate for a power line.

Display features include:

• General Information: The DSR4 can display any type of information with a mix of graphics and text including traffic conditions, emergency instructions, and local events.
• Analytical Function: Using a built-in sensor, the display can quantify and classify passing traffic for statistical analysis to enhance urban mobility.
• Speed Information: The DSR4 detects the speed of approaching vehicles and displays appropriate messages to encourage safe driving at the right speed limit.