What does a '0 block' typically indicate in this system?

• A. It marks the most distant block from downtown.
• B. It usually marks the baseline or central area near downtown; exact meaning depends on local convention.
• C. It indicates a blocked street.
• D. It marks the northern boundary.

Answer: (B)

In block grids used for major streets, a zero block serves as the origin for measuring distance from downtown. In Oklahoma City’s system, this origin is typically placed near downtown, so block numbers grow outward from that central point. That’s why the zero block is described as marking the baseline or central area near downtown, with the exact spot defined by local convention. It isn’t about being the farthest block, a blocked street, or a boundary like the northern edge—the zero block is simply the starting reference for the grid.