The number of lanes that are inbound on the intersection and allow vehicle to turn in the same direction.
otherlanes
The number of lanes that are inbound on the intersection but that do not share the same direction.
Remarks
The otherlanes parameter functions differently than might be suggested at first. The best description could be the number of lanes that have a different direction than the inbound lane but a lower id number. Therefore when the direction is right the otherlanes parameter is always zero. when the direction is left the otherlanes parmeter is (lanes turning to the right + lanes going ahead).