Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/272

 {| ! rowspan=2|Type of road (permanent speed limit) !|Minimum siting distance of first sign in advance of the works !|Minimum clear visibility distance to first sign !|Minimum size of warning or regulatory sign (Note 1) !|Distance from end of works to "End of road works" signs !|metres and miles !|metres !|mm !|metres (30 mph or less) (40mph) (50mph or more) 90 at 60mph (40 mph or less) (50 mph) (1 mile where congestion is likely) Relaxation: 800m (60 mph) (2 miles where congestion is likely Relaxation: 1 mile (national speed limit) (3 miles where congestion is likely)Relaxation: 1 mile hard shoulder only closure
 * Single carriageway road
 * Single carriageway road
 * 20m—45m
 * 60
 * 600
 * 10—30
 * Single carriageway road
 * Single carriageway road
 * 45m—110m
 * 60
 * 750
 * 30—45
 * Single carriageway road
 * Single carriageway road
 * 275m—450m
 * 75 at 50mph
 * 900
 * 30—45
 * Dual carriageway road
 * Dual carriageway road
 * 300m
 * 60
 * 750
 * 45
 * Dual carriageway road
 * Dual carriageway road
 * Standard: 800m
 * 75
 * 1200
 * 90
 * Dual carriageway road
 * Dual carriageway road
 * Standard:1 mile
 * 90
 * 1500
 * 90
 * Dual carriageway road
 * Dual carriageway road
 * Standard: 2 miles
 * 120
 * 1500
 * 90
 * Dual carriageway road (national speed limit)
 * Dual carriageway road (national speed limit)
 * 800m
 * 120
 * 1500
 * 90
 * } 271