Hi Imonal. I have to agree with Freodin. I like the overall style you are going for, but the roads are a problem. They are indeed too thick and pixelated, and the white stroke surrounding them is incongruous with the piece overall. I would also agree that dotted lines might be best for a piece like this, and I would use the same color scheme as you are using for your location names.

Cheers,
-Arsheesh