speed limit in OSM

Hello,
it seems that, using the OSM maps, speedlimits are shown only for the 'maxspeed' tag.
The tags 'maxspeed:forward' and 'maxspeed:backward' are not used.
This means that for areas with different speedlimits in the different directions the speedlimit will not be shown on mapfactor.
One Example is 'line: 206068976'
I'm using Navigator 12.3.0 on windows mobile.
best regards
Werner