City of Frisco Engineering Standards

Engineering Standards
Cross Street
Alley
Residential Street
ROW
Minimum of
40 Feet or
One Subdivision
Lot Width
Type D or Above Thoroughfare
FIGURE 2.18: Minimum Distance from Intersection for Parallel Alley
4. All alley intersections with streets shall be perpendicular or radial, within a five degree (5°)
tolerance, at the intersection of the ROW lines.
5. The offset between alleys on opposite sides of a residential street shall be less than three feet
(3’) or greater than seventy-five feet (75’) measured from edge of alley to edge of alley.
6. Alleys shall not align with existing or future streets or driveways on the opposite side of a
street. Alleys shall be offset from such a street or driveway by a minimum of seventy-five
feet (75’) measured from edge of alley to edge of street or driveway.
7. Alleys that intersect at “elbow” street intersections shall not intersect within thirty (30°)
degrees of the centerline of the adjacent streets. See Figure 2.19.
8. Alleys shall not intersect with a roundabout.
Section 2 – Thoroughfare Design Requirements May 2012 Page 2-29