Projects

Tunnel Lighting

National Route 401 Hakasetoge Bypass, Hakase TunnelAizumisato Town - Showa Village, Fukushima Prefecture

Brightly and safely illuminating the tunnel section of the new bypass which supports improvements in transport access in the Aizu region

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  • The 6m wide two-lane road in the tunnel is illuminated by LEDioc TUNNEL KAE Series luminaires to deliver appropriate illuminance levels along both horizontal and vertical planes.

  • Constructed with a compact aluminum housing, LEDioc TUNNEL KAE Series luminaires can operate at 100% or 75% output to suit the light levels outside the tunnel.

  • LEDioc TUNNEL KAE Series luminaires in situ.

  • The lengthy 4503m tunnel is safely illuminated with LEDioc TUNNEL KAE Series luminaires.

  • EYE TUNNEL Automatic Dimmer units have been installed at both entrances to Hakase Tunnel.

  • Alarm display boards have been installed by each entrance to the tunnel.

  • The auxiliary alarm display panel shows any information and alerts about what is happening inside the tunnel.

  • Located in the electrical control room of Hakase Tunnel, the controls device monitors and regulates emergency installations.

  • The remote tunnel management office of Fukushima Prefecture Aizu Wakamatsu Construction, where the surveillance and regulation of the emergency installations at Hakase Tunnel are carried out via Alarm display operation terminal.

  • Storage box for the emergency use telephone.

  • Emergency use telephone.

about

Installation date

September, 2023

Location

Opened in September 2023, the new National Route 401 Hakasetoge Bypass connects Aizumisato Town and Showa Village in Fukushima Prefecture. Works on the 7.5km road were commenced by the Prefectural authorities in 2017, with the Hakase Tunnel making up a section of around 4.5km. Hakasetoge had long been a problematic traffic area due to the succession of sharp curves and steep slopes along its narrow road. Whilst previously the route was often also closed off during times of snowfall, the opening of the bypass now allows for passage throughout the year; it is anticipated that the bypass will reduce regular journey times by around 10 minutes, and by as much as 40 minutes during winter seasons where previously diversions and detours were necessary.

LEDioc TUNNEL KAE Series tunnel luminaires have been installed to provide the lighting both inside and at the entrances of the Hakasetoge tunnel, which is the longest under the management of the prefecture. Considering the significant length of the tunnel, EYE TUNNEL Automatic Dimmer units have been installed to detect the light levels at each entrance and in turn ensure the illuminance is set to an appropriate level.

Additionally, installations for emergencies are linked to remote monitoring control devices as well as receiver controls within the construction management office, doubling up on automated surveillance and controls, and subsequently delivering and maintaining safe, bright light along the tunnel of a bypass which is contributing to greater convenience for the people of the area.

Specification

  • LEDioc TUNNEL KAE Series

    Basic Lighting - 198

    Entrance Lighting - 420

  • Emergency Parking Bay Indicator - 10

  • EYE TUNNEL Automatic Dimmer - 2

  • Emergency equipment