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A 30 mph speed limit reminder road sign. Used when there is insufficient street lighting for a road to legally have an automatic 30 mph speed limit. In the UK Highway Code for England, Scotland and Northern Ireland, a built-up area is a settled area in which the speed limit of a road is automatically 30 mph (48 km/h). In Wales it's 20 mph (32 ...
A street light, light pole, lamp pole, lamppost, streetlamp, light standard, or lamp standard is a raised source of light on the edge of a road or path. Similar lights may be found on a railway platform .
Ground position light [16] signals (GPLS), are always illuminated and are located either near the ground or on a post with no corresponding main signal. They can display the following aspects: Either two red lights or one white light and one red light in a horizontal arrangement, meaning 'Stop'. Two white lights at a 45° angle, meaning 'Proceed'.
'BT' – to mark it as a British Telecom UK Pole (This can also be PO (Post Office) or GPO (General Post Office) depending on the age of the pole) a horizontal line marking 3 metres from the bottom of the pole; the pole length, typically 8 to 10 metres, [22] and size. 9L is a 9 metres long, light pole, other letters used are 'M' (Medium) and 'S ...
On the M25 for example, distances are referenced to a point near Junction 31 even though the section of the ring road between Junction 31 (post 186.6) and Junction 1a (post 5.7) is the A282, not the M25. [3] On motorways distance marker posts also bear an arrow pointing towards the location of the nearest emergency telephone. [4]
At 250 km/h the tracks have a centre-to-centre distance of 4.5 m (15 ft) (while the first tracks in the 1980s were built with a distance of 4.7 m (15 ft)). The TGV track construction puts both rail tracks into a common concrete block, so they can disregard a safety margin for track displacement.
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Some British railway companies used the Coligny-Welch signal lamp to clarify night aspects; this was fitted to distant signals and showed a white vee in addition to the main red or green light. The Ministry of Transport recommended that the colour of distant signal arms and spectacles be altered from red to yellow in the early 1920s, although ...