City of Frisco Engineering Standards

Engineering Standards
18' ROW
12'
14'
42'R
14' 12' 18' ROW
20'
Taper
15'
Tangent
15'
Tangent
20'
Taper
40'R
14'
12'
15'
Tangent
20'
Taper
18' ROW
FIGURE 2.20: Alley to Alley Intersection
13. The radius of alley pavement at street intersections shall not be less than fifteen feet (15’). At
the intersection of two alleys, the radius of the alley ROW is dependent upon the alley ROW
intersection angle as listed in Table 2.8. At the intersection of two alleys, the radius of the
alley pavement shall be two feet (2’) greater than the radius of the alley ROW.
TABLE 2.8: Alley Intersecting Alley Radius
Alley ROW Intersection Angle Minimum Required ROW Radius (ft)
1°-40° 70
41° -70° 50
71° -90° 40
> 90° 50
B. Alley ROW Width – Alley ROW shall be eighteen feet (18’) wide except for certain townhome
developments that are required by the Zoning Ordinance to follow the design standards in the
Form-Based Code Manual.
C. Alley Pavement Width – Alley pavement shall be twelve feet (12’) wide except near alley
intersections, as shown in Figure 2.20, and except near street intersections as shown in
Figure 2.21.
Section 2 – Thoroughfare Design Requirements May 2012 Page 2-31