Horizontal curves for roads with less than 1,500vpd

For those roads where the AADT is less than 1,500vpd, the arrangement and spacing of edge marker posts on horizontal curves should:

be as indicated in Table 3-6 and as shown in Figure 3‑5, and Figure 3‑6 (both figures below);
Table 2-36
not be located on the inside of horizontal curves with radii equal to or less than 600m; and be spaced/adjusted to ensure that at least three posts are visible to approaching drivers at geometrically substandard horizontal curves.

Table 3‑6: Edge marker post spacing table for rural local authority road with AADT less than 1500 vpd

Horizontal alignment	Retroreflector type (see note 1)		Spacing (m)		Post location
Horizontal alignment	Left	Right	Intermediate (see note 2)	Curve	Post location
All curves radius over 600m	A	B	100	100	Pairs opposite
LH curves radius equal or less than 600m and greater than 140m		C	75	50	Right only
RH curves radius equal or less than 600m and greater than 140m	A		75	50	Left only
LH curves radius equal or less than 140m		C	50	25	Right only
RH curves radius equal or less than 140m	A		50	25	Left only
Horizontal alignment	Retroreflector type (see note 1)		Spacing (m)		Post location
Straights	A	B	100	N/A	Pairs opposite

Table 3-6 notes:

Details of retroreflector types are shown in Figure 3‑4 (details of edge marker posts and retroreflective strips).
Figure 3-4
Refer to Figure 3‑5 (edge marker post installation on rural roads with AADT less than 1500 – Left hand curve for details of intermediate spacing), below.

Figure 3‑5: Edge marker post installation on rural roads with AADT less than 1500 – Left hand curve

Figure 3‑6: Edge marker post installation on rural roads with AADT less than 1500vpd – Right hand curve

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