Hello. Thanks for mapping.
Please be more accurate at buildings with extensions. You often just draw a rectangular.
About tagging highways.
Narrow traces (<2mtr) are no residential highways but Paths. Please map them 
with that tag,
 How to measure the width of a road in IDeditor:
 
 Ctrl+⇧ Shift+M – toggle measurement panel Draw a line between the shoulders of a trace (zoom in very far) and read the distance.
Best regards