View bridge construction   View with trolley bus   View 2006 photograph Stuart Street extension overbridge at Highgate created after removal of old cable car lines. The official opening of the bridge was in 1954 and completed the Stuart Street extension. I believe the bridge was constructed initially without the road cutting being in place - in other words, the basic concrete bridge was constructed first (built on the ground), then the earth was excavated from beneath it on completion. Photo (K111) by Alan Gilchrist See also: Other construction photographs.