# The Traffic Signs Regulations and General Directions 2016, Part 4: Optional supplementary plates used only in combination with signs shown in Part 2

Extent: E+W+S

Sign table — Schedule 13, Part 4
(1)
Item
(2)
Description
(3)
Sign diagram
1
Diagram 511
Reduction in speed necessary at a hazard ahead
2
Diagram 513.2
Maximum speed in mph advised at a hazard.
3
Diagram 7009.1
Risk of skidding and maximum speed 20 mph advised on road with loose chippings

---
Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/part/4 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/part-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.