gistfile1.cs

var umpd = "NON";
foreach (var rv in r.Vehicles)
{
  if (rv.UmpdLimit.Equals("NONE"))
  {
     data["umpdlimit" + (rv.VehicleIndex + 1)] = "NON";
  }
  else
  {
     data["umpdlimit" + (rv.VehicleIndex + 1)] = rv.UmpdLimit;
     umpd = rv.UmpdLimit;
  }    
}

data["umpdlimit"] = umpd;