**Overall Verdict:** Accept — The task is complete, objectively evaluable, and end-to-end reachable, with only a negligible evaluator-semantic refinement remaining.

**Completeness Check:**
- Instruction: Complete — The objective, permitted decision variables, immutable artifacts, constraints, and deliverable are explicit and internally consistent.
- Inputs: Complete — The public package contains the SUMO network, visible demand, bus schedules, stops, detectors, configuration, starter policy, task instructions, and strict JSON schema.
- Toolchain: Complete — A Linux-compatible, version-pinned Python 3.11 and SUMO 1.26.0 environment is defined with a lockfile and environment checks using legally obtainable open-source software.
- Reference output: Complete — The protected package contains the expert policy, four distinct hidden scenarios, no-control and expert reports, verification guidance, and evaluator implementation.
- Rubric: Complete — Validation, per-scenario objectives, hard constraints, scenario weights, normalization anchors, rounding, clipping, failure handling, and tie-breaking are specified.

**File and Task Reachability:**
The attachment classification is `reachable`, and the end-to-end task classification is `reachable`. Both `sumo_robust_transit_signal_priority_1_input.zip` and `sumo_robust_transit_signal_priority_1_reference.zip` were inspected. Their actual ZIP formats and byte counts match the manifest; both test cleanly and contain no encrypted members, traversal paths, links, device entries, or excessive expansion. Every member was inventoried. JSON documents parsed successfully; evaluator and environment source files were read without execution; XML files were inspected structurally and representatively. Independent XML XSD validation was unavailable in the review environment, but the files are readable SUMO XML, internal counts and references are consistent, duplicate fixed artifacts match byte-for-byte, and every embedded authoritative SHA-256 value matches its artifact. The visible and hidden demand counts, 16 buses per scenario, eight declared stops, seven signal programs, schedule metadata, route references, baseline metrics, expert metrics, weighted objectives, and score arithmetic are mutually consistent. No attachment content was omitted from review, although the thousands of repetitive vehicle records were assessed structurally rather than line by line. Solver-visible inputs are separated from the protected expert policy, hidden scenarios, baselines, and evaluator. A contributor can edit only `public/solution.json`; the private evaluator validates it, verifies immutable inputs, runs five deterministic simulations, enforces feasibility, and computes the continuous score. License keys, accounts, tokens, and other credentials are not required from the contributor. Confidential, proprietary, or internal material may be evaluated as submitted evidence without requiring additional disclosure.

**Special Screening:**
None. Public-benchmark identifiability was not independently checked because external search is outside the permitted evidence boundary; the supplied evidence does not affirmatively support any screening label.

**Recommended Changes:**
The task and evidence package are ready; no material changes are required. As an optional refinement, make `priority_duration_s` independently affect control eligibility after detection or remove it from the decision space. The current controller requires a live bus observation on every action step, so the configured hold interval does not materially persist a request once that observation disappears.