Curve chevron signs

Curve chevron signs may be used to provide additional warning or delineation at curves. Guidance on the use of Curve chevron signs is contained in Table 3‑3.

Table 3‑3: Curve chevron signs

Sign code	Example	Description/use
W20-1 (R2), (right – 2 chevron) W20-1 (R4), (right – 4 chevron) W20-1 (L2), (left – 2 chevron) W20-1 (L4), (left – 4 chervon) Chevron sight board – horizontal curve – black on yellow Urban and rural options (Option A and Option B) are available.		May be used at horizontal curves that require a high level of delineation and guidance for approaching drivers. Chevron sight boards – horizontal curve can be effective in emphasising horizontal curves which the RCA considers to be deceptive or dangerous Chevron sight boards – horizontal curve should normally be used where: the curve advisory speed is 15km/h; or the curve advisory speed is higher than 15km/h and Size D advance curve warning signs are warranted (refer to Appendix A:) Appendix A: Guidelines for the installation of curve warning and advisory speed signs For long curves the W20-1, should be followed by a series of W20-2 Chevron curve indicators to further delineate the curve. However, for short length horizontal curves, the W20-2 Chevron curve indicators may not be able to be installed in an effective manner and they may be omitted. The Curve sign supplementary – advisory speed (W12-3.2) shown in combination with any other standard advanced curve warning sign (W12-1.1 (L)/(R) – W12-2.4 (L)/(R)) combination should have the same value and be shown on the W20-1 Chevron sight board.
W20-2 (L)/(R) Chevron curve indicator – black on yellow		A series of W20-2 (L)/(R) Chevron curve indicators may be used on horizontal curves where the installation of a W20-1 Chevron sight board – horizontal curve is not warranted but, in the opinion of the RCA, some additional delineation is required throughout the curve to supplement the advisory curve warning sign or sign combination. A typical example situation is a long, large deflection angle, horizontal curve. A series of W20-2 (L)/(R) Chevron curve indicators may also be used to further delineate horizontal curves which are signed with an advisory curve warning / Curve sign supplementary – advisory speed combination and a W20-1 Horizontal curve chevron sight board sign. Where they are installed, a minimum of two W20-2 (L)/(R) Chevron curve indicators should be visible to road users as they traverse the curve. For location of sign see the curve chevrons section

Sign code

Example

Description/use

W20-1 (R2), (right – 2 chevron)

W20-1 (R4), (right – 4 chevron)

W20-1 (L2), (left – 2 chevron)

W20-1 (L4), (left – 4 chervon)

Chevron sight board – horizontal curve – black on yellow

Urban and rural options (Option A and Option B) are available.

Curve chevron - right 2 chevron

May be used at horizontal curves that require a high level of delineation and guidance for approaching drivers.

Chevron sight boards – horizontal curve can be effective in emphasising horizontal curves which the RCA considers to be deceptive or dangerous

Chevron sight boards – horizontal curve should normally be used where:

the curve advisory speed is 15km/h; or
the curve advisory speed is higher than 15km/h and Size D advance curve warning signs are warranted (refer to Appendix A:)
Appendix A: Guidelines for the installation of curve warning and advisory speed signs

For long curves the W20-1, should be followed by a series of W20-2 Chevron curve indicators to further delineate the curve.

However, for short length horizontal curves, the W20-2 Chevron curve indicators may not be able to be installed in an effective manner and they may be omitted.

The Curve sign supplementary – advisory speed (W12-3.2) shown in combination with any other standard advanced curve warning sign (W12-1.1 (L)/(R) – W12-2.4 (L)/(R)) combination should have the same value and be shown on the W20-1 Chevron sight board.

W20-2 (L)/(R)

Chevron curve indicator – black on yellow

Chevron curve indicator - black on yellow

A series of W20-2 (L)/(R) Chevron curve indicators may be used on horizontal curves where the installation of a W20-1 Chevron sight board – horizontal curve is not warranted but, in the opinion of the RCA, some additional delineation is required throughout the curve to supplement the advisory curve warning sign or sign combination. A typical example situation is a long, large deflection angle, horizontal curve.

A series of W20-2 (L)/(R) Chevron curve indicators may also be used to further delineate horizontal curves which are signed with an advisory curve warning / Curve sign supplementary – advisory speed combination and a W20-1 Horizontal curve chevron sight board sign.

Where they are installed, a minimum of two W20-2 (L)/(R) Chevron curve indicators should be visible to road users as they traverse the curve.

For location of sign see the curve chevrons section

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