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T.P.DJM.V.2.4
4.5.18 Signing and Lighting
4.5.18.1 Design of signing and lighting should form an early part of the
overall design process.
4.5.18*2 "Give Way" signs should be erected in association with the "Give
Way" dotted lines at all roundabout approaches. The "Give Way"
triangular marking is not required unless particular emphasis is
required.
4.5.18.3 On the central island of normal roundabouts "Turn Left" signs
and "Chevron" signs should be erected opposite each approach.
These may be moved further to the left to emphasise the angle of
turn and thereby encourage lower traffic speeds. At mini
roundabouts the central dome or circular marking should be free
of all signs, lighting columns or other street furniture.
4.5*18.4 The "Roundabout Ahead" sign should be used on all approaches and
may be supplemented with a "Reduce Speed Now Plate", where high
approach speeds are anticipated. "Count-down" markers and
"Yellow Bar 11 markings are also effective in reducing speeds.
4.5.18.5 A map type advanced direction sign should be used on the
approaches of all roundabouts on major routes and can also prove
beneficial on minor routes where the roundabout is an irregular
shape.
4.5.18.6 Road markings should channelise traffic and where appropriate
indicate a dedicated lane. Lane dedication should not be used
however where entries are less than three lanes wide. Where any
particular lane is dedicated the other lanes should also have
arrow markings. Lane dedication arrows and markings on the
circulatory carriageway are not recommended.
4.5*18.7 The provision of road lighting at roundabouts should be regarded
as an essential safety requirement. When an existing roundabout
junction is being modified, the lighting should be checked for
suitability with the new road arrangement.
4.5.18.8 For detailed information on signing Volume 3 of this Manual
should be consulted.