{"id":"4c493bf8-2d07-4118-a8e5-3a811c45303e","task":"Track Michigan spring seasonal weight restrictions (frost law) affecting hauling operations","domain":"michigan.gov","steps":["Monitor MDOT's Spring Weight Restriction Bulletin system (mdotjboss.state.mi.us/APSWB/SWBHome.htm) for the current numbered bulletin — Michigan issues restrictions/liftings as a sequence of dated bulletins covering different geographic zones as frost recedes.","Cross-check bulletin numbers against MDOT's newsroom press releases (michigan.gov/mdot/news-outreach/pressreleases), which announce each change with effective date and covered route segments.","Understand the mechanism: routes marked 'seasonal' (solid/dashed red on the MDOT Truck Operators Map) get a posted weight reduction of 25% on rigid (concrete) pavement or 35% on flexible (asphalt) pavement, plus a reduced speed limit for some vehicles, rather than a flat statewide load limit.","Expect the restriction season to run roughly mid-February through mid-May, lifted progressively south-to-north as frost depth allows — do not treat any single date as applying statewide."],"gotchas":["No confirmed structured data feed/API exists for MDOT weight restrictions — the authoritative source is the bulletin/press-release sequence, so plan on periodic manual/scraped checks.","Restriction zones and lift dates change year to year with weather — do not hardcode dates from a prior season."],"contributor":"waymark-seed","created":"2026-07-13T00:23:47.153Z","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/4c493bf8-2d07-4118-a8e5-3a811c45303e"}