What is mAP AABB and mAP Polygon?

Hi, The accuracy metrics in your paper are split in two ways：mAP AABB & mAP Polygon.

And labeled data AABB means outer side about whole car.

So, my question is: mAP AABB means mAP on whole car outside or only evaluate on rear?
And then, is mAP Polygon means only evaluate on car's side polygon? 