Hello,
Mentioned keys (subj) are ignored (never worked in v.1.x, till the latest nighly build 2.0.0#9736M).
If needed for testing/simulation, I can provide coordinates of roads where those keys are.
>" Driving direction. Where different speed limits are specified for each driving direction those can be specified using maxspeed:forward=* resp. maxspeed:backward=*, whereas forward applies to the speed limit for the same direction as the OSM way and backward to the speed limit for the opposite direction. "
T&R,
Andrey