This data set covers 877 structures within the Greater London boundary / M25 comprising of low bridges, tunnels and road barriers in a .csv file which will be updated annually. It is available in our Roads data bucket under the folder /Bridges - restrictions. The data contains the following variables: Variable Description / value Height restriction(m) • Up to 3.0 • Between 3.1 and 3.5 • Between 3.6 and 4.0 • Between 4.1 and 4.5 • Between 4.6 and 5.1 Height restriction (imperial) • Up to 9'10" • Between 9'10" and 11'6" • Between 11'9" and 13'0" • Between 13'3" and 14'9" • Between 15'0" and 16'6" Easting X-coordinate Northing y-coordinate Grid Reference Grid reference value Lat Latitude value Lng Longitude value Borough Borough name Road name Road name Road number Road Number TLRN [Red route]? • Yes = restriction is located on TLRN • No = sign is NOT located on TLRN (TLRN = Transport for London Road Network Area = Red Route, road network controlled by TfL) Comments Additional information