Measuring Luminance with Digital Photometric Camera in Short Tunnels

This paper refers to the measurement of luminance in a short straight tunnel using a digital camera that functions as luminance meter, as well as LMK mobile air device. The measurement of luminance had been conducted in the evening of January 2020 ans September 2020, in accordance of the standard EN 13201-4:2015 - Road lighting - Part 4: Methods of measuring lighting performance respectively. To consider the guide for the lighting of road tunnels and underpasses CIE 88:2004, from the analysis of the obtained results it is observed that the luminance is not adequate, i.e. they have values lower than the recommended minimum. In order to obtain a suitable lighting in accordance with the standard and the guide, it is necessary to redesign the lighting in the tunnel using LED luminaires with luminous and energetic efficiency superior to the HPS luminaires which currently illuminates the tunnel.