Already here viewtopic.php?f=24&p=563408#p563408
but not too many ppl look in that forum.
In addition to what is said above, I think that one slightly valid excuse for some is the distances they have to travel. Unfortunately, the distances people need to travel to get to a school have increased. Sometimes, that's sprawl. Sometimes, that's because the school was 'Jeff
'ed a decade ago, or for some other reason has closed down. Sometimes, where zoning is not operating, ppl choose to take their children further afield (reputation/ and/or private schooling/whatever). Sometimes, when zoning IS operating, the closest/zoned school is not the easiest to get to.
Thing1 walks to school most of the time. Rides to school at least once a week. But both of those are (mainly) because it's the most convenient ways for us. I ride to work, so she rides with me. Getting our car anywhere near her school at 9am is a ni-hi-hightmare. (I assume, I've never done it - but I do ride past it quite regularly).
SWMBO is now confident enough in Thing1's abilities to ride her to school too, at least on the (currently) one day that it suits with her commute.
There are some of Thing1's peers who are dropped by car because the parent then drives on to work. (Sometimes that's because they have to go on to drive a long distance to work. Sometimes they drive less distance to school than we walk/ride, and then less distance on to work than we ride).
It's also fair to say that our bike parking at school is getting close to being at a premium, however I've had that discussion with the principal. He said if there's more bikes, it'll get built. I've suggested, "If you build it, they will come".
Ride2School day is well-patronised. But, I think that could be mainly because parents make a special effort to escort their child. And/or make arrangements for others to do the same.
Having said that - on two of the days Thing1 walks, we generally help escort other kids there. Hmm... I wonder if other parents would trust me to escort their kids on bikes? (Perhaps they'd trust me, but not so much their kid?)
Oh, and of course, I have to post this. (Of course!)
ETA - Oh, and Manning... some workplaces allow that sort of flexibility. Some don't. (Mine does, but my last 3 wouldn't have - but then, I don't work for those types of workplaces any more, and the advent of Thing1 is one of the main reasons why).