Hi,
Your sentences are quite funny to me
Iâd say âdown the streetâ mean people assume she is an uptown lady, âin the streetâ when sheâs going between blocks of flats in the US and âon the streetâ when in Asia.
Actually, âonâ or âinâ here is the same in the sense that sheâs simply walking on a road. âDown the streetâ may imply sheâs âup toâ something like shopping