Core77

Norway's Auto-Dimming Highway Lights

Smart motion sensors provide an enormous savings on electricity costs

By Rain Noe - January 2, 2018

in Sustainable Design

In our homes, the budget-minded among us will turn a light off when leaving a room. There's no point in paying for electricity when no one is around to reap its benefits. But this money-saving tactic has traditionally not been possible with highway lights, which municipalities are obligated to leave on all night in case a car should pass.

The Norwegian municipality of Nes I Hole has therefore installed sensors on their light poles along their local Highway 155. With no cars around, the lights default down to 20% of their power; as soon as they detect an oncoming vehicle, the lights kick up to 100%, and communicate with each other to synchronize the illumination with the car's presence. Here's how it works:

Enter a caption (optional)

As stated in the video, the system will pay for itself in under five years, and other countries with higher energy costs would reap the savings even faster.

o

Favorite This
Q
3

Comment

Comments

Donald Jones

6 years ago

Z

Z

Reply

This must be Eastern Norway.

!Report as spam
Daren R

6 years ago

Z

Z

Reply

how does this work for pedestrians or cyclists?

!Report as spam
- Mike Cheung
  
  Daren R
  
  6 years ago
  
  Z
  
  Z
  
  Reply
  
  I imagine in person, the 20% is enough for someone moving slower like a pedestrian / cyclist.
  
  !Report as spam