Fix number of existing lanes

[gmatosferreira]

As far as I understand, the number of lanes is including the existing ones + the potential lanes from parking removal.
These should be separated.
I suggest:
Lanes: the existing ones as OSM info
Parking: number of additional potential lanes resulting from parking removal

So, in filters, the number of lanes should be the existing, and add another filter to consider or not the potential parking ones (when existing)