Taper.

From 1 July 2026, NZGTTM is mandatory across New Zealand and CoPTTM is no longer accepted. That is not a small update. It moves traffic management from prescriptive off-the-shelf layouts to a site-specific risk assessment for every plan. For the civil contractors, event organisers, arborists and utilities who need a traffic management plan to work on or near a road, it is a real compliance cliff, and most of them are used to pulling a standard diagram off a shelf.

Taper drafts a risk-based NZGTTM traffic management plan from a street address, complete with the risk assessment and the layout diagram, ready for an STMS to review and sign. You put an address in, you get a compliant plan out.

The engineering discipline here mattered more than anywhere else I build. Every safety-critical number and every control-type decision lives in a deterministic rules engine, backed by a full Pest test suite. The AI narrates the risk prose but is never allowed to originate a number or choose a control. That separation is the whole product. On top of that sits an SVG diagram engine that speaks proper temporary traffic management vocabulary, cones, advance warning signs, stop and go points and dimension lines, plus server-side PDF export and a LINZ geographic layer for accurate site mapping.

The honest constraint is that a real STMS has to validate the output before this goes fully commercial, so it is deliberately scoped to Stage 1: low-volume and Level 1 roads, static operations, a single site, works only, with everything else routed away by a qualification gate. It is racing a hard regulatory deadline, and it is built so the human who signs the plan stays firmly in control.