Steep Hill Upwards Ahead Road Sign | Permanent UK Road Sign 

- Post Mountable with 2 fixing rails

- Class 2 R2/RA2 Reflective

- Available in 450mm, 600mm, 750mm, 900mm Tri

An important sign to warn motorists of a steep uphill section of road ahead where the gradient is marked in % to illustrate the severity of the decline . Diagram 524.1 has no variations. 

Specification: 

Material: R2/RA2 reflective overlay on aluminium composite backing

Fixing Method: 2 fixing rails for post mounting

Reflectivity: Class 2 R2/RA2

As per the UK Highways Traffic Sign Manual Chapter 4 - Warning Signs page: 33 The following advice is given:

6.1.1.  Steep hills are signed using diagrams 523.1 (S2‑2‑18, see Figure 6-1) and 524.1 (S2‑2‑19, see Figure 6-2) together with associated plates. The gradient is calculated using the tangent of the angle concerned, although in practice it makes little difference whether the sine or the tangent is used. The gradient on signs must be expressed as a percentage; old signs showing a ratio may remain in place until life‑expired. 6.1.2.  The sign to diagram 523.1 should normally be used only where the gradient is 10% or more. The actual gradient to the nearest whole number should be indicated on the sign, e.g. a gradient of 10.4% should be signed as 10%, but 10.6% as 11%.