The geometry of the three-tiered retaining walls
is emphasised by a series of compact fluorescent marker lights, which
create a datum for each tier of the embankment wall. The apparent colour
of the dichroic lenses changes with the viewing angle, so that they
shift from blue through pink to white, as drivers navigate the roundabout.
The spacing of the marker lights is also compressed closer to the bridge,
to reinforce the sense of arrival at the airport
Asymmetric metal halide uplights with deep blue
filters illuminate the pre-cast concrete soffit of Nimrod Bridge. The
upward wash of blue light is punctuated by a grid of virtually maintenance-free
white LED luminaires mounted on the underside of the concrete soffit
spanning the roadway. The supporting columns are accented by a series
of narrow beam downlights, which graze light down each vertical face,
effectively grounding the illuminated soffit overhead.
