NEXCO EAST Kanto Regional Head Office Saku Management Office (Saku City, Nagano Prefecture) introduced "Pro-beam lighting using LED"* on Wednesday, September 26 in the Joshin-Etsu Expressway Nikkureyama Tunnel. To do.

Expressway is the first case of introducing LED pro-beam lighting in NEXCO EAST.

This lighting not only improves the visibility of the preceding vehicle for the driver, but also aims to save power, have a long life, high efficiency, and reduce the environmental load (reduction of CO2 and lamp waste control) in the future. ..

• What is "LED Pro Beam Lighting"?
  By utilizing the strong directivity that is the characteristic of the LED, the light emitted from the lighting is directed to the traveling direction of the vehicle as shown in the figure below, and stable visibility of the preceding vehicle can be obtained. Furthermore, by narrowing the installation interval, unevenness of light and darkness on the road surface (light and dark stripes) will be reduced.

the next deployment

Based on the results of this trial introduction, we will study how to further reduce power consumption while ensuring visibility in the tunnel space.