I agree with the comment about the double parking and not using the crossings.. It seems crazy to me that you are willing to break the law/risk your children's and others safety for the sake of a few minutes or few extra steps..

And that is the reason I don't let my DD walk from the top of the hill down to her school on her own. (we don't live within walking distance, so have to drive, but can park and let her walk). There is a driveway into a nursing home that borders the school, and with the amount of illegally parked cars near it, and the haste of some drivers in and/out the driveway is too risky. I do let both my kids (DD is 6, DS nearly 5) go ahead of me, but they know the marking before the driveway that they need to stop and wait. I am actually more relaxed about the idea of parking on the other side of the road, with more residential driveways, and letting DD walk to the crossing and cross with the crossing lady/man, rather than navigate one driveway..