Table 404-1: Block Sizes
| |||
---|---|---|---|
Planning Context
|
Block Length
(feet)
|
Block Area
(acres)
|
Cul-De-Sac Limits
(feet)
|
Walkable/Compact: downtown, core areas of commercial centers,
and abutting blocks adjacent to walkable places
|
250 minimum;
500 maximum
|
2.5 to 5
|
Prohibited
|
General: traditional neighborhoods, near downtown areas, and
areas supporting commercial corridors
|
350 minimum;
800 maximum
|
4 to 8
|
250 maximum
|
Suburban: areas more removed from walkable centers, commercial
corridors or large-scale projects arranged around a campus plan
|
500 minimum;
1,000 maximum
|
5 to 8
|
500 maximum
|
Table 404-2: Street Design Types and Functional Classification
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---|---|---|---|---|---|
Street Type
|
Arterial
(A)
|
Collector
(C)
|
Local
(L)
| ||
Standard
A basic street type appropriate generally where no particular
development characteristics or urban design context warrant application
of other street types
|
▪
|
□
|
□
| ||
Activity
A pedestrian-oriented street type appropriate for all areas
where walkability is a goal. It is characterized by narrow lanes,
slow speeds, on-street parking, and large, well-designed pedestrian
amenity zones that support businesses and economic activity along
these streets.
|
□
|
▪
|
▪
| ||
Neighborhood
A community-oriented street type appropriate where a higher
level of neighborhood design amenity and neighborhood walkability
is desired. It is characterized by large street trees, sidewalks,
slow speeds, and occasional on-street parking.
|
▪
|
▪
|
▪
| ||
Natural
A green street type appropriate where streets cross or align
with natural features, particularly to emphasize the open space and
environmental themes of a particular context. It is characterized
by slow to moderate speeds, and informal and natural landscape edges,
and the incorporation of trails or other open spaces.
|
□
|
▪
|
▪
|
▪
|
Preferred type
|
□
|
Limited type, based on street network plan and surrounding development
context and natural characteristics
|
Figure 303-1 Corner Radii Comparison
Two (2) curbs with differing radii, ten (10) feet and thirty
(30) feet, overlap with a red shaded area highlighting the difference
in vehicular space, pedestrian space and crossing distances
|
Figure 303-2 Corner Radii Measurement
The figure demonstrates the typical method for measuring a corner
radius at the intersection.
|
Table 404-3: Corner Curb Radius
| |
---|---|
Intersection Type
|
Curb Radius
(feet)
|
Local/Local
|
5 to 15
|
Local/Collector
|
10 to 20
|
Local/Arterial
|
15 to 20
|
Collector/Collector
|
10 to 20
|
Collector/Arterial
|
20 to 30
|
Arterial/Arterial
|
25 to 30
|
Figure 303-4 Clear Sight Distance
A clear line of sight must be maintained at a specific distance
depending on the design speed of the roadway, and the stop point and
control type on the intersection. This grants drivers appropriate
warning on incoming vehicles.
|
Table 404-4: Clear Sight Distance
| |
---|---|
Design Speed of Intersection Street
(miles per hour)
|
Intersection Sight Distance
(measured along center line of intersecting street)
(feet)
|
15
|
105
|
20
|
125
|
25
|
150
|
30
|
200
|
35
|
225 to 250
|
40
|
275 to 325
|
45
|
325 to 400
|
Source: American Association of State Highway and Transportation
Officials, A Policy on Geometric Design of Highways and Streets.
|
Planning Context
|
Natural Area
|
Park
|
Trail/Greenway
|
Green
|
Square
|
Plaza/ Courtyard
|
Pedestrian Enhanced Streetscape
|
---|---|---|---|---|---|---|---|
Walkable/Compact: downtown, core areas of commercial centers,
and abutting blocks adjacent to walkable places
|
□
|
□
|
□
|
▪
|
▪
|
▪
|
▪
|
General: traditional neighborhoods, near downtown areas, and
areas supporting commercial corridors
|
□
|
▪
|
□
|
▪
|
▪
|
▪
|
□
|
Suburban: areas more removed from walkable centers, commercial
corridors or large-scale projects arranged around a campus plan
|
□
|
▪
|
▪
|
▪
|
□
|
□
|
□
|
▪
|
Preferred type
|
□
|
Limited type, based on opportunities corresponding with the
context or more specific plan
|
Table 404-6: Required Open Space
| |
---|---|
Zoning District
|
Amount Required
|
R-1
|
5%
|
R-2, R-3, R-4
|
10%
|
R-5
|
15%
|
OTD, B-1
|
5%
|
P-EC, B-2, B-4
|
12%
|
B-P
|
20%
|
I-1, I-2, I-3, U-1
|
N/A, required buffers and screening addresses open space
|
PLCD
|
N/A, open and civic space is primary use
|
Size. The size, location, and design of natural
areas shall be dependent on the planning context, the presence of
natural amenities and ecological functions worthy of protection, and
the ability of the designated area to provide significant continuity
with nearby natural features. In general, these areas should provide
the opportunity to coordinate with at least 5 acres of contiguous
preserved area; and ideally up to 40 or more acres. However, the actual
sizes of specific components of natural areas shall be dependent on
environmental and aesthetic benefits and importance to larger-scale
natural systems.
| |
Service Area: N/A
| |
Level of Service: 12 acres per 1,000 people
|
Size:
| |
0.25 to 1 acre (mini-park)
| |
0.25 to 10 acres, 5+ acres ideal (neighborhood)
| |
10 to 50 acres; 10+ acres ideal (community)
| |
50 acres minimum for passive uses or structured recreation fields
or regional
| |
Service Area:
| |
1/4 to 1/2 mile (neighborhood)
| |
1/2 mile to 3 miles depending on size (community)
| |
Level of Service: 12 acres per 1,000 people
| |
Note: Public dedication and acceptance of parks is dependent
on other parameters of the Parkville Park Master Plan.
|
Size:
| |
20 feet minimum width; 30 feet+ ideal, but dependent on topography
and natural features
| |
Trails/greenways shall be located to provide continuity through
the area, with connections to other supporting facilities and the
ability to link important destinations for those on foot or on bicycle,
such as parks, schools and community centers or other civic destinations.
| |
Service Area: 1/8 mile, or 1/4 mile from access
point
| |
Level of Service: 12 acres per 1,000 people
| |
Note: Public dedication and acceptance of a trail/greenway is
dependent on other parameters of the Parkville Parks Master Plan.
|
Enhanced pedestrian streetscapes are an area along the street
frontage that may be common or dedicated to the public as part of
the right-of-way standards. It includes pedestrian enhancements beyond
those required by the street type standards to support buildings fronting
directly on the streetscape.
| |
Size: 8 feet to 10 feet along the frontage, designed
as an extension of the streetscape. Any street designed with sidewalks
16 feet or wider can count this area towards the 8-foot requirement.
| |
Service Area: on block or immediately abutting
lots
| |
Level of Service: N/A
|