This a real functioning public access street. Notice that it is one of only two very narrow streets connecting Lane 118’s Alley 1 and Alley 3 to the rest of the world.
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This is the other one.
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Those photos were taken by Tonghua Night Market (lower middle of map). It’s not far from Taipei 101.
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Here’s an area map at the 100 foot scale. Note the nearby Family Mart, and at least 12 eateries.