Paragraph 15

The centre line of the carriageway shall be marked on the crossing between the stop lines mentioned in paragraph 12 and for a distance of 12 metres on each side of the railway measured along the centre of the carriageway from the stop lines with a reflectorised double continuous line road marking of the size and type shown in Diagram 1013.1A in the Regulations. The centre line shall be continued on each side of the railway along the centre of the carriageway from the ends of the double continuous line up to (but not beyond) the position of the sign shown in Diagram 784 of the Regulations and referred to in paragraph 19 with a reflectorised continuous line and a broken line on its right hand side of the size and type shown in Diagram 1013.1D in the Regulations.