City of Frisco Engineering Standards

Engineering Standards
3. Standard Driveway – Provides two-way access at a single, undivided curb opening. The
minimum width of a standard driveway depends on land use and is shown in Table 2.9.
4. One-Way Driveway – Provides only inbound or outbound access and can only be permitted
when the orientation of on-site circulation and parking layout clearly utilize the driveway for
one-way movements. The minimum width for a one-way driveway depends on land use and
is shown in Table 2.9.
5. High Capacity Driveways – Intended to provide two-way access with geometric provisions
which more adequately respond to greater driveway volumes and/or access limitations than
standard driveways. These provisions include increased width, increased internal storage and
a median divider.
a. Divided high capacity driveways are required at the first median opening downstream of
a Type A-A, A-B, or B-B intersection.
b. The primary multi-family driveway shall be a divided high capacity driveway at a median
opening.
c. Divided high capacity driveways are required on Type A or Type B thoroughfares when
the number of parking spaces per driveway exceeds two hundred (200), except along a
frontage road.
C. Driveway General Design Parameters
1. The centerline angle for a driveway approach shall be ninety degrees (90º) to the street curb
line for all driveways.
2. Driveways shall not be permitted in the taper area of any right-turn lane or deceleration lane.
3. Driveways that intersect at a mid-block median opening shall have the driveway centerline
intersect with the midpoint of the median opening (measured nose-to-nose).
4. Driveway connections can be required by the Director of Engineering Services to ensure
adequate circulation.
5. Driveway elevations at the ROW line of a public street shall be a minimum of six inches (6”)
above the street gutter. A residential driveway that intersects an alley shall be a minimum of
three inches (3”) above the edge of the alley pavement at the ROW line and shall be high
enough to maintain gutter capacity.
6. Cross access is required between adjacent non-residential properties so that each property can
share the use of the driveway(s) on the adjacent property. A shared driveway that is centered
on the common property line is also encouraged. When one non-residential property
develops before the adjacent property develops, the full width of the shared driveway shall be
constructed at that time.
7. Driveway grades in a fire lane shall not exceed six percent (6%). Steeper grades may be
permitted in areas where buildings are not present, as approved by the Director of
Engineering Services and the Fire Department.
8. Driveways that serve as a fire lane shall be a minimum of twenty-four feet (24’) in width.
Section 2 – Thoroughfare Design Requirements May 2012 Page 2-34