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 the other. The division between the opposing traffic lanes is marked by double white lines to diagram 1013.1 version B. A new road marking to diagram 1013.5 is used in the centre of the road where the overtaking lane changes from one direction of travel to the other. Upright signs used to indicate the number of traffic lanes available and where a particular overtaking lane comes to an end are prescribed as diagrams 888 to 891 in Part 2 of Schedule 11. Guidance on the use of these signs and markings and details, including design principles and road layouts, can be found in Departmental Standard TD 70 "Design of Wide Single 2+1 Roads".

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