http://la.streetsblog.org/wp-content/uploads/ubrayj_crosswalk.jpgUsing refrences help a lot. I would kill some colours too, though you can still use what you have if you like but bump the contrast up. Do not overdo the worn effect, right now it just looks badly painted.
What I think is a major issue is how many road colours compared to the 1 white paint colour you have. It's like two seperate styles, one on top of the other, therefor making the crosswalk look abstract to the path and road.
Also for the pavers that dip in, both sides are shaded as darker making it look like any light source you have is comming from directly above. Not a great look.
The side view looks wrong because you can't just rotate a tile 90 degrees and expct it to work. because it's at a 45 degree perspective top-down that means that some of the shaded area on the bottom piece will be hidden by the lip (not sure what else to call it) whilst the other top side will look more apparent and larger. Make sense at all? (I hope so my typing and explanation is horrible at the moment)
3&4 is yet again a contrast issue. bump it up!
Also could be considered not a major issue with the tileset itself but try to make an outer corner and an inner corner set of tiles as the outer corner of a turn will have a much larger curve and take up several tiles compared to the inner-turn tile. Hence why your road looks
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@TV boy- the image-linked above (at top of post) is for your sake too. Many parts of the world are different. Ladder walks as you call them are mostly present in Australia and many Asian countries.
ps please ignore spelling, kind of tired.