<a href="//commons.wikimedia.org/wiki/Lothian_Buses" title="Lothian Buses">Lothian Buses</a> bus 905 (reg. SN08 BXV), seen here working an eastbound journey of route 26 to Restalrig, heading along Princes Street across the Hanover Street/Mound junction. The right indicator light is presumably to avoid an obstruction, or possibly due to a diversion, since the route ordinarily continues further on to the end of the street.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/25034321@N05">Ninian  Reid</a> from Perth, Scotland (original), cropped by User:Ultra7
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ninian_reid/16546492261/">DSC_0012</a> (cropped and lightened)