grass area turned into shared car park/recreation area

we have recently begun building works across our large complex and as a result, about 50 residences will be prevented from accessing their garages between 8am and 4pm each day until the works finish (i believe this will be another four months). the problem is that the EC has decided that a large grass area in the front of some townhouses used primarily as a thoroughfare across the complex and by children playing is the new temporary car park.

one small child walking with her dad was already nearly wiped out by a car as they walked out of their property (car missed her by less than a foot) and it is highly likely to happen again because of poor visuals of cars entering off the driveway etc. 

those of us in the townhouses have other reasons for wanting this stopped also (our homes are constantly covered in dirt (inside and out) where the cars have destroyed the grass and created  a dust-bowl and our homes are constantly filled with exhaust fumes).

but the bigger issue really is the danger. should we make an anonymous complaint to the complex insurer, or is there another body that would make a ruling its not safe? – there has to be someone who would look at this situation and see how ridiculous it is and put a stop to it. the EC have no interest at all in addressing the issues and really cannot see how dangerous it is despite being told repeatedly.