Hello mahmoud_eltorky, I saw you added layer=1 to footbridges in this changeset, the ones south of Zawra Park just above Yafa Street. Just wanted to let you know that these bridges are actually on ground level not above the ground and the road under them are not on normal surface level.      
Just wanted to share this info as my local knowledge of the area and I'm not sure if layer=1 is ok when the object on ground level. 
Please let me know what do you think about this.        
Thank you and regards.    