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T.RD.M.V.2.6
6.4 Permanent Signs and Road Markings
6.4.1 General
6.4.1.1 Detailed information on the size, location and mounting of permanent traffic signs and
directional signs is given in Chapters 2 and 3 of Volume 3 respectively of this manual.
6.4.1.2 The start and end of an Expressway which will generally mean all entry and exit points at
the junction of the slip roads with the minor road network, must be signed by the appropriate
Expressway sign as shown on Diagram 6.4.1.1 to indicate that the legislation pertaining to
Expressways applies.
6.4.1.3 The Expressway signs should be located on the nearside verge in the case of single lane slip
roads, and opposite each other on both sides of the carriageway on two-lane slip roads, as
shown on Diagram 6A.I.2.
6.4.1.4 A "NO ENTRY" sign, traffic sign 115, should be mounted on the reverse side of each "END
OF AN EXPRESSWAY" sign, traffic sign 354, to make it clear that traffic must not enter the
exit slip road.
6.4.1.5 Expressway confirmation signs should be placed approximately 100m beyond the end of
each acceleration taper. The signs, which must also show the appropriate route number
shield, should always be located singly at the back of the nearside verge, as shown on
Diagram 6.4.1.2. Further information on these confirmatory signs is given in Chapter 3 of
Volume3.
6.4.1.6 Traffic sign TS 737 "REDUCE SPEED NOW" is used with transverse yellow bar markings
at the deceleration lane of Expressway where there is a reduction of speed limit. They are
used to alert motorists to reduce speed when they leave the mainline. The signing and road
markings are shown in Diagram 6.4.1.3.
6.4.1.7 All regulatory and warning traffic signs used along an Expressway must be reflectorised and,
other than for repeater signs, should be of the equivalent 1200mm size.
6.4.1.8 Warning signs used along Expressway should be located assuming the highest speed limit, in
accordance with Table 2.2.2.1 of Chapter 2, Volume 3, that is 250m - 300m in advance of
the hazard and having a minimum clear visibility of 100m. Any supplementary plates used
with these signs should be the largest plate size available, again, in accordance with Table
2.2.2.1 of Chapter 2, Volume 3, assuming the highest approach speed.
6.4.1.9 On Expressways, because of the need to maintain an unobstructed shoulder along the
nearside of each carriageway, it is essential that careful consideration is given to the location
of permanent road signs at the design stage. Whilst the smaller repeater signs used for
speed limits can usually be accommodated behind the barrier fence or at points where extra
space is available, the larger signs such as 'direction signs', 'advanced direction signs', main
speed limit signs, and the start/end of Expressway signs, will require specific space to be
made available. Guidance on the location of permanent road signs is given in Diagrams
6.4.1.4 to 6.4.1.6 inclusive, and further advice can be found in Chapters 2 and 3 of Volume
3.