div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: · Optimized optical design based on international road tunnel and underpass lighting regulations JTJ 0261-1999 CIE 88:2004 RP-22 both symmetric asymmetric light distribution src=https:reader033vdocumentsnetreader033viewer20220423055ed12ecc50612c658265efa1html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: · Optimized optical design based on international road tunnel and underpass lighting regulations JTJ 0261-1999 CIE 88:2004 RP-22 both symmetric asymmetric light distribution src=https:reader033vdocumentsnetreader033viewer20220423055ed12ecc50612c658265efa1html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv