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T.P.D.M.V.2.4
If a pedestrian crossing is required the shadow island should
not be used as a central refuge.
Diagram No. 4.3»16*3
This shows a 7»3m wide single two lane carriageway with 5m wide
shadow islands and a two lane approach on the minor road* This
layout is appropriate to a more heavily trafficked situation
than the 3.5m wide islands* However shadow islands with widths
greater than 3«5m should not be used on roads with design speeds
above 80 km/h.
If a pedestrian crossing is required the shadow island should
not be used as a central refuge,
Diagram No. 4.3*1.6.*J
This shows a 10m wide physical island on a single 2 lane road,
appropriate to a busy rural junction. The 10m island (including
metre strips) is capable of sheltering most vehicles turning
right from the minor road. This type of layout (also depicted
in Drawings 4.3-16.5, 11 and 12) requires a certain amount of
judgement and caution to be exercised by the conflicting right
turning traffic movements.
A diverging lane is also shown and would be incorporated if the
left turn flow into the minor road was heavy.
Diagram No» *{.3*16.5
This shows a T-junction on a dual two lane carriageway with 10m
central reserve and merging lane. It is appropriate with a
heavy left turn from the minor road and heavy right turns.
Diagram No. 4.3.16.6
This shows two possible layouts for urban crossroads with the
encroachment of long goods vehicles annotated on each. As
stated for Layout 1 the kerb treatments are only examples. For
new junctions cross roads are only acceptable for low minor road
flows.
Diagram No. **.3.16«7
This shows two possible layouts for rural crossroads. Crossroads
should be avoided for new construction in rural areas and the
layouts are presented for improvement to existing junctions. The
hardstrips should be introduced locally to emphasise the
junction if not already present on the route.