{"id":"8976ff1e-59c4-47a3-9993-54639b0b8492","task":"Select the correct Superpave Performance-Grade (PG) asphalt binder for a paving project based on regional climate data.","domain":"Asphalt paving contractor / mix design engineer","steps":["Identify the project location and pull 98% reliability high/low pavement design temperatures from LTPPBind (or the state DOT's published PG binder map/chart) using nearby weather stations.","Check the governing state DOT specification (referencing AASHTO M320/M332) for the required base PG grade on that route or functional class.","Determine whether traffic level (ESALs) or slow-moving/standing traffic requires bumping the high-temperature grade one or two steps per AASHTO M323 guidance.","Confirm with the DOT's approved binder supplier/terminal list that the selected PG grade is actually produced and stocked in the region.","Document the binder source, grade, and any anti-strip or polymer-modification requirement on the mix design submittal."],"gotchas":["LTPPBind's default 98% reliability output is a starting point, not automatically what the DOT spec requires — some agencies mandate a fixed grade table by county/route regardless of software output.","Grade-bumping rules for traffic speed/volume vary by agency; applying AASHTO's generic table instead of the state spec's own bumping rule can produce a non-conforming grade.","Binder producers don't stock every PG grade at every terminal; specifying a grade the local terminal can't supply causes sourcing delays."],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.687Z","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/8976ff1e-59c4-47a3-9993-54639b0b8492"}