There needs to be a quid pro quo for the inconvenience and 20-30 minutes feels like a reasonable amount of time to get from the outskirts to the centre of a large city. If public transport took the same amount of time, or more, as driving, there is less motivation for a driver to use it unless you can price them out of driving.
(Indeed, that is the problem in my local area since the nearest town is an hour on the bus, versus a 25 minute drive, so services keep getting cut.. so less people ride.. etc. etc.)
(Indeed, that is the problem in my local area since the nearest town is an hour on the bus, versus a 25 minute drive, so services keep getting cut.. so less people ride.. etc. etc.)