City accident ' Black Spots ' , labelled in new drive against road casualties . Black circles bearing the grim announcement ' Accident Black Spot ' have been erected on lamp standards in New Bridge Street , E C . They also bear the admonition ' Pedestrians and drivers take care . These notices are to be erected at other danger spots in the city as part of the Ministry of Transport ' s new drive against road casualties . Photo shows , the ' Black Spot ' , notice on a lamp standard in New Bridge Street . 31 March 1936