Study on Energy Saving Technology of Night-time Illumination of Expressway Tunnel

Abstract

With the continuous expansion of the scale and number of highway tunnels in China, the power consumption of highway tunnel lighting has gradually become a huge amount for operating units. How to reduce the power consumption of lighting for highway tunnels has become an important issue for operating units. However, energy saving does not mean less or no lights, the premise must be to ensure the safety and comfort of driving in the tunnel. In this study, based on the light environment characteristics of the tunnel at night, the visual resolution level of the target obstacle in front of the road is judged by the human eye ’s saccade time, and whether the reduction of road lighting brightness under the effect of the headlights will affect the driver ’s visual resolution level. The results show that the turning on of the car's high beam lights has a certain effect on the driver's visual perception ability; when the average brightness of the road surface is 1.0cd/m², the tester's saccade and fixation time on the target obstacle are less than 0.5cd/m², But the driver has no significant difference in the resolution of the target obstacles under these two brightness levels; when the brightness of the road surface is 0.5 cd/m², the driver still has confidence in the situation ahead; it is recommended that the entrance and exit have a certain distance The tunnel brightness can be adjusted to 0.5cd/m².