{
 "Name": "Get related block key",
 "Description": "Get related block key of a given sub block key on \"DC Advanced Lenear Referencing System (ALRS) Route.\"",
 "Usage": "The \"getBlockKeyFromSubBlockKey\" operation returns related block key for a given sub block key for DC Roadways. It accepts Sub Bloock Key.",
 "Input Parameters Description": {
  "subBlockKey     ": "     Sub Block key. cannot be blank."
 },
 "Return Value Description": {
  "blocks": {
   "blockKey": "Unique block key",
   "blockId": "Block Id",
   "routeId": "Route Id of the block",
   "fromMeasure": "Start measure of the block (METERS)",
   "toMeasure": "End measure of the block (METERS)",
   "routeName": "Name of the selected route",
   "fromStreet": "From block intersection name",
   "toStreet": "To block intersection name",
   "fromIntersectionId": "From block intersection id",
   "toIntersectionId": "To block intersection id",
   "fromIntersectionKey": "Unique from block intersection key",
   "toIntersectionKey": "Unique to block intersection key",
   "directionality": "Traffic directionality of the block",
   "unitBlock": "Unit block"
  }
 }
}