Follow the Cairns.

My first assumption was that low-carbon mobility meant persuading people out of their cars. That position did not survive contact with the site. Some visitors rely on a car because of age, disability, distance, caring responsibilities, weather or time — a project aimed at stopping car use would exclude exactly the people the brief asked us to consider.

So the target moved. Not who drives, but what conditions make driving feel like the only reliable option. In this park those conditions concentrate in one moment: leaving the museum after dark in winter, and deciding whether walking, the shuttle or onward transport still feels usable.

The third insight was the one we chose, because it was the only one where the tension had two sides that could not both be satisfied by the obvious answer. Making people feel safe after dark points straight at more lighting. Protecting the park's nocturnal ecology points straight away from it.

We named that as the design site: after-dark safety versus wildlife disturbance — a specific time, a specific place, a human need and an ecological limit, all in the same fifteen minutes of someone's evening.

We mapped potential effects of artificial light on insects, bats and birds. That research shaped a lower-impact design intention; it did not establish that the proposed system would be harmless to wildlife.

That chain is why the design is warm, low, targeted and time-limited rather than simply “eco-friendly”. It also gave us a framework to work inside — the DarkSky principles for responsible outdoor lighting: useful, targeted, low-level, controlled, warm-coloured.

Our first concepts were all lighting: glowing wristbands, phone-torch modifiers, reflective vests, luminous stones. They answered the brief but treated safety as a visibility problem. Feedback after the interim presentation asked how stargazing groups move safely in dark environments without strong light sources — and that question moved the project from illumination to low-impact navigation.

The cairn came from secondary research into Scottish landscape navigation. It could sit low, give confirmation rather than flood the path, and read as part of the park rather than as imported urban infrastructure.

Continuous light spills past the path boundary, burns all night with nobody present, breaks the time-limited ecological principle, and — the part that surprised us — destroys the “follow” experience entirely. An always-lit route would also lose the sequential guidance we wanted to explore.

We selected intermittent, motion-activated lighting as a way to address both needs: the next marker would appear before the previous one dims, then the route would return to darkness. Whether that sequence offers enough reassurance for different walkers remains a question for field testing.

As a single marker it would still only fix one fragment of the journey, and the research had shown the failure was the departure sub-system as a whole: spatial legibility, service communication, perceived safety and ecological responsibility all failing at the same moment. So I proposed treating the cairn as a navigation language that could appear before the visit, at the museum exit, along the path, at the shuttle stop and in future shelters.

Partner feedback pushed in the same direction and gave the system its hierarchy: Mother Cairns as decision nodes at museum exits, path junctions and transport connections, and Sub Cairns as continuity nodes that hold route confidence in between. That distinction is what turned a set of parallel components into a network.