NM502 Roundabout design drawing

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Below is a drawing of the conceptual design adopted by the Los Alamos County Council in 2012. This sketch is overlaid on the existing street photo.

Below is a "95%-complete" drawing for the roundabout planned for the intersection of Trinity Drive, Central Avenue, and Fourth Street. Drawing orientation is the same as the drawing above.

The major changes between the conceptual design sketch and the 95% design drawing are

  • Roundabout shifted westward (left) to incorporate Fourth Street
  • Size increased to raise the nominal vehicle speed from 18-20 mph to 25 mph

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