The situation

Two lift banks, three stair cores, and a bridge between blocks that only some people know about. Every floor has its own logic, and a visitor who takes the wrong lift has to come back down and start again. Floors 1 and 2 connect through both banks. Floors 3 and 4 reach the east wing through one of them. Staff navigate this by memory. Visitors navigate it by asking.

What the guidance does

Routing runs across levels rather than within a single floor. The route planner picks a path through the building graph: which lift, which floor, which corridor, which door. Closed corridors and one-way security doors are excluded from routes, so the instructions match the building as it is today. Ramps and step-free paths are selectable for anybody who needs them, and the level indicator shows the current floor as the person moves.

What changes

A move between blocks becomes a sequence of short, certain instructions. The lift lobby stops being the place where people stand reading signs.

Where this stands

Running in Fortis Hospital across six floors with two connected wings. Routing combines a grid search with a pathway graph, applies wall avoidance and door punches, and penalises unnecessary turns so routes read the way a person would describe them. Cross-level connectors carry movement between floors, and the live floor indicator ships with the map.