We really need these! On pilot in the UK so I don't know how they have been received.
I have noticed in London that there seem to be few school buses other than those collecting children with special needs and some of the private schools which run their own minibus service. Perhaps its something to do with more limited geographical catchment areas ie denser population hence more schools around, or its meant to encourage them to walk( ha) however it would be interesting to know more information.
Not everyone can walk to school and some parents have to do drop offs at different schools/childcare settings in the mornings so they clearly have little option other than to drive. Having a really good system of school buses would surely cut down on the school run traffic jam and also free up spaces on buses like the P4 and keep the charming youth of today in one place. I travelled by a dedicated school bus when younger and I remember us all being lectured for getting out of the control- the driver always had to stop and threaten to throw us off. And this was a girls grammar school. I think problems are inevitable at least on the way home.
PS I am a fan of the walking bus arrangements , I just don't think it will be practical for everyone.