Every spring, northern states and provinces impose weight restrictions on roads as frost leaves the ground. The pavement is weakest during thaw, and unrestricted heavy loads cause millions in damage. The problem: every state publishes restrictions differently, with different dates, formats, and geographic references. Fleet operators check each state manually. Road511 normalizes spring load limits from MN, WI, MI, ON, QC, and NS into one API with polyline geometry and active date ranges. The Data curl "https://api.road511.com/api/v1/features?type=weight_restrictions&jurisdiction=MN" \ -H "X-API-Key: your_key" Enter fullscreen mode Exit fullscreen mode { "data" : [ { "id" : "mn-wr-zone3-seg12" , "jurisdiction" : "MN" , "feature_type" : "weight_restrictions" , "name" : "CSAH 5 - Frost Zone 3" , "start_time" : "2026-03-10T00:00:00Z" , "end_time" : "2026-05-15T00:00:00Z" , "properties" : { "restriction_type" : "seasonal_weight" , "weight_limit_tons" : 5 , "frost_zone" : "Zone 3" , "from_location" : "TH 10" ,…