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4*3*3 Siting of Priority Junctions
4,3*3.1 Where possible it is preferable to site junctions on level
ground or in sags rather than at or near the crest of hills*
Drivers approaching a junction on an uphill gradient have
difficulty in appreciating the junction layout whereas when they
are approaching on a down gradient they have a good view of the
situation ahead,
4.3*3.2 On curved sections of major roads, minor roads should be brought
in on the outside of curves if possible* This is especially
important on climbing lane sections or dual carriageways.
4.3.3*3 On single carriageways where overtaking opportunity is limited,
care must be taken in siting shadow islands to avoid these
sections being used for through route overtaking manoeuvres*
4.3*3*4 The number of junctions should be kept to a minimum by
collecting lightly trafficked accesses into a service road which
can form a single junction with the major road*