text: so this https://www.openstreetmap.org/way/30697685 and this https://www.openstreetmap.org/way/43179368 is maxspeed 30 with source of maxspeed as a sign?
  And this https://www.openstreetmap.org/way/4340940 way has maxspeed 50?
  What is the source of the last one? Is it an explicit 50 sign or a "no limit 30" sign as a source?