City of Frisco Engineering Standards

Engineering Standards
(600’) measured from the Type A or Type B thoroughfare ROW line. Such an entrance street
shall be a minimum of thirty feet (30’) wide, face to face, or be divided according to Section
2.03.B.7. On each side of the entrance street, at least one cross street shall have a minimum
width of thirty feet (30’), face to face, between the entrance street and the first intersection
that provides access deeper into the subdivision. See Figure 2.7 for an example.
30' Street
Entrance Street
30' Street
30' Street
Type A or B Thoroughfare
FIGURE 2.7: Example of 30’ Entrance Street Requirements
3. Residential streets that do not intersect with a Type A or Type B thoroughfare shall not
exceed one thousand two hundred feet (1,200’) in length before changing direction. A
change in direction occurs when one of the following elements is used:
a. A horizontal curve radius of three hundred fifty feet (350’) for a Type D thoroughfare or
of two hundred fifty feet (250’) for a Type E, F, or G thoroughfare that changes the
course of the street between ninety (90°) and one hundred twenty degrees (120°) (see
Figure 2.8). A tangent that is a minimum of one hundred feet (100’) long shall be
provided between reverse curves.
b. A street offset using two elbow intersections, each between ninety (90°) and one hundred
twenty degrees (120°). The minimum distance between reverse elbows shall be one
hundred fifty feet (150’). See Figure 2.9.
Section 2 – Thoroughfare Design Requirements May 2012 Page 2-17