To note, kids commonly ignore cars and drivers and continue to ride their bikes and scooters and bimbas weaving in and out and around the cars trying to carefully maneuver through the lot. Granted, the driver has to always be extra cautious, but the kids are way too flippant about the dangers. The parking lots are made for cars but are also used as playgrounds by the children of the adjacent buildings and this causes an inherent danger. As I once heard said, pedestrians may generally have the right of way but it doesn't help much if they dont want to spend months recuperating from an injury or have to undergo operations and needless to say if killed.

That being said, back to the psak, so a couple rabbonim got together and issued a psak saying drivers need to drive slowly and carefully paying attention to their surroundings and residents and children and parents of children need to be careful and recognize that the parking lot is dangerous and kids should not be there playing unsupervised. Drivers should make sure to install in their cars whatever safety features and sensors that are available and can even pay for them with maaser money.