Verified end-to-end on the local OSRM stack:
- internal/traffic: 511NY OData client (lenient decode, raw archive),
Overpass way matcher (class-window selection: highest-class road within
150m beats a closer service road), incident policy map, CSV builder
- cmd/traffic: fetch | match | apply; apply copies the dataset (CoW) and
re-customizes the traffic layer in ~15s (v26 customize has no
--output-prefix; it writes contract files in place)
- Proof: synthetic I-90 closure → 38s (static :5000) vs 142s (traffic
:5002) on the same 0.87 km stretch
- Policy speeds are 'assumed' provenance; R4: traffic routes must carry
computed(traffic, as_of, policy=assumed)
