Shadow/Crack appearing on part

Help. These little irritating cracks/shadow always shows even if I scale it to the right position. I have circled the shadow/crack.

This is a flat terrain template and even though it shows I have used all these tools (mostly the flatten tool)
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How can I fix this issue and what’s causing it?

Does this crack move when you move the super market model?

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The only thing I can think of for this is that you have an overlapping part thats gray. If the problem persues, just rebuild the floor.

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I believe this is a case of z-fighting where your two road pieces are overlapping, causing the texture to have twice the opacity in the middle

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