Hello Felix,
This setting was once really useful.....
Now it is hardcoded into mkgmap to set all transport types except bus and emergency to no. Could this please be reversed!!!!
Actually, no. That's because the "carpoolness" of a way is specified by having all of the access bits except for CARPOOL, EMERGENCY (and, optionally, BUS) disabled. That's how it becomes a carpool way. The fact that, say, BICYCLE access is disabled for a carpool way will not stop a bicycle routing over that way unless the GPS/mapsource is told to avoid carpool lanes. That's how it works.
If people want to use it for not allowing those types of transport, it would be much better to be able to set them individually! (and yes I know bus/emergency will be disrespected when carpool attribute is set). There is no sense in blocking this, if all GPS have a checkbox to block carpool lanes anyhow!
You cannot disable access for specific vehicle types (e.g. TAXI) if the way is a carpool. Mark