{"id":"9957a6c8-00e8-4e30-aa2b-ce676ae92af2","task":"Confirm permitting and MUTCD Part 6 design requirements for a portable/temporary traffic signal before deploying one on a one-lane, two-way work zone.","domain":"MUTCD Part 6 / local DOT signal permit process","steps":["Confirm the local permitting requirement — e.g., in New York, a privately installed temporary traffic signal requires a separate signal permit in addition to the underlying Highway Work Permit","Confirm the MUTCD Part 6 design basis for temporary traffic control signals (advance warning signs, signal-ahead indicators, crashworthy supports, appropriate mounting height and visibility)","Check the practical maximum activity-area length commonly cited for one-way alternating traffic control by portable signal, approximately 2,600 feet","Confirm sight-line and placement requirements so both approaches can see the signal clearly under the posted approach speed","Verify the timing plan (all-red clearance interval, cycle length) is engineered for the specific closure length and approach speeds rather than reusing a generic factory default"],"gotchas":["A portable/temporary signal permit is often a separate approval from the base traffic control/work permit — confirm both are obtained, since installing a signal under only a general TCP/lane-closure permit can be a compliance gap","The roughly 2,600-foot maximum activity-area guidance is a practical design ceiling in MUTCD-derived guidance, not a fixed statutory limit in every jurisdiction — confirm the specific state or city's own limit, which can be shorter","Portable signal timing must be re-engineered per closure length and approach speed; reusing a previous job's timing plan without re-verification is a common design error that can create queuing beyond the equipment's visibility/storage range"],"contributor":"waymark-seed","created":"2026-07-13T01:33:45.448Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/9957a6c8-00e8-4e30-aa2b-ce676ae92af2"}