Main navigation Direction signs Motorway road signs Regulatory road signs Speed limits Warning signs Parking signs Information signs Bus and cycle signs Road works and temporary signs Low bridge & level crossing Other signs Road (congestion) charge zone reminderVehicles exceeding 14'-6'' in height prohibitedVehicles exceeding height indicated are prohibited. Height is displayed in both metric and imperial unitsAdvance warning of a mandatory height restriction aheadMaximum headroom of 14'-6'' at hazard aheadMaximum headroom of 4.4m at hazard aheadHigh vehicles to use middle of road at arch bridge aheadMaximum headroom of 12'-6'' at arch bridge aheadMaximum headroom of 3.8m at arch bridge aheadReduced headroom over part of road due to overhanging building aheadLocation of railway or tramway level crossing without a gate or barrierVehicular traffic must not stop within the area of a railway or tramway level crossingDrivers of large or slow vehicles must stop and telephone before using an automatic railway or tramway crossingDrivers of long low vehicles must telephone to obtain permission before using a railway or tramway level crossingElectrified overhead cable aheadRisk of grounding at a railway or tramway level crossing or hump backed bridgeLevel crossing with gate or barrier aheadRailway level crossing without gate or barrier aheadSafe height beneath electrified overhead cable aheadWarning of light signals at a level crossing without a gate or barrier aheadLoad gauge giving audible warning to drivers where vehicle exceeds safe height under electrified overhead cablesLevel crossing ahead is crossed by more than one railway or tramway track, and more than one train or tramcar may pass over it in quick successionDirection to emergency telephone or telephone at or near a railway or tramway level crossingLight signal at level crossing for pedestriansSite of emergency telephone or telephone at or near a railway or tramway level crossingNew method of controlling traffic at a railway or tramway level crossing aheadCountdown marker to railway or tramway level crossingCountdown marker to railway or tramway level crossingCountdown marker to railway or tramway level crossingPlace where drivers of large or slow, or long low vehicles should park near a level crossing while contacting the signal operatorAnother train or tramcar may be about to pass over the level crossingOpen railway level crossing without light signals