City of Frisco Engineering Standards

Engineering Standards
5. The minimum distance between median openings on a Type A or B thoroughfare where leftturn
storage is provided in both directions for Types C, D, E, F, and G intersecting
thoroughfares and driveways is shown in Figure 2.14. The distances shown are measured
nose to nose. Refer to Table 2.11 for driveway design requirements.
Type A or B Thoroughfare
Mid-Block Opening for a
Commerical Collector,
Residential Collector, or
Non-Residential Driveway
150 Ft. Storage
400 Ft. Overall
100 Ft. Taper
100 Ft. Taper
150 Ft. Storage
Mid-Block Opening for a
Commercial Collector,
Residential Collector, or
Non-Residential Driveway
Mid-Block Opening for a
Commercial Collector,
Residential Collector, or
Non-Residential Driveway
Type A or B Thoroughfare
350 Ft. Overall
150 Ft. Storage
100 Ft. Taper
100 Ft. Taper 100 Ft. Storage
Mid-Block Opening for
any Residential Street
that is not a Collector
Type A or B Thoroughfare
300 Ft. Overall
Mid-Block Opening for
any Residential Street
that is not a Collector
100 Ft. Storage
100 Ft.
Transition
100 Ft. Taper
100 Ft. Storage
Mid-Block Opening for
any Residential Street
that is not a Collector
FIGURE 2.14: Minimum Distance between Mid-Block Median Openings on a Type A or B
Thoroughfare
6. Medians without Left-Turn Lanes in Both Directions
a. If a left-turn lane is required in only one direction, the minimum length of the median
shall be the sum of the required left-turn storage, taper length, fifty foot (50’) tangent, and
length of median nose. This requirement is reflected in Figure 2.15. This median design
is only allowed if access is not compromised for vacant property on the opposite side of
the thoroughfare.
Section 2 – Thoroughfare Design Requirements May 2012 Page 2-24