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A. General to All Transect Zones

1. The public frontage is the area between the curb of the vehicular lanes and the Property Line/ROW. The public frontage contributes to the character of the transect zone, and includes the types of sidewalk, curb, planter, and street trees.

2. Public frontages shall be designed and allocated within transect zones as shown in Table 5.10.060.A-B

3. Within the public frontages, the prescribed types of public planting and public lighting shall be as shown in Tables 5.10.060.C-D. The spacing of the public planting may be adjusted with the approval of the Director to accommodate specific site conditions.

B. Specific To Transect Zones T1, T2, T3

1. The public frontage shall include trees of various species, naturalistically clustered, as well as understory.

2. The introduced landscape shall consist primarily of native species requiring minimal irrigation, fertilization and maintenance. Lawn shall be permitted only with approval by the Director.

C. Specific To Transect Zones T4, T5, T6

1. The introduced landscape shall consist primarily of durable species tolerant of soil compaction.

D. Specific To Transect Zones T4

1. The public frontage shall include trees planted in a regularly-spaced allee pattern of single or alternated species with shade canopies of a height that, at maturity, clears at least one Story.

E. Specific To Transect Zones T5, T6

1. The public frontage shall include trees planted in a regularly-spaced allee pattern of single species with shade canopies of a height that, at maturity, clears at least one

Story. At retail frontages, the spacing of the trees may be irregular, to avoid visually obscuring the shopfronts.

2. Streets with a Right-of-Way width of 40 feet or less shall be exempt from the tree requirement.

F. See Section 4.60 (Landscape and Utility Standards) for additional standards for landscaping and utilities within public frontages.

Table 5.10.060.A. Public Frontage Types

Public Frontage Type

Transect Zone

Key    By Right    By Warrant    Not Allowed

(HW) For Highway. The For Highway Frontage has bicycle trails, no parking and open swales. The landscaping consists of the natural condition or multiple species arrayed in naturalistic clusters. Buildings are buffered by distance or berms.

T1T2T3T4T5T6

(RD) For Road. The For Road Frontage has open swales, a walking path or bicycle trail along one or both sides, and yield parking. The landscaping consists of multiple species arrayed in naturalistic clusters.

T1T2T3T4T5T6

(ST) For Street. The For Street Frontage has raised curbs drained by inlets and sidewalks separated from the vehicular lanes by individual or continuous planters. The landscaping consists of street trees of a single or alternating species aligned in a regularly spaced allee.1

T1T2T3T4T5T6

(DR) For Drive. The For Drive Frontage has raised curbs drained by inlets and a wide sidewalk or paved path along one side, related to a Civic Space. It is separated from the vehicular lanes by individual or continuous planters. The landscaping consists of street trees of a single or alternating species aligned in a regularly spaced allee.

T1T2T3T4T5T6

(AV) For Avenue. The Avenue Frontage has raised curbs drained by inlets and wide sidewalks separated from the vehicular lanes by a narrow continuous planter or separate tree wells with grates with parking on both sides. The landscaping consists of a single tree species aligned in a regularly spaced allee.

T1T2T3T4T5T6

(CS) For Commercial Street or Avenue. The For Commercial Street or Avenue Frontage has raised curbs drained by inlets and very wide sidewalks along both sides separated from the vehicular lanes by separate tree wells with grates. The landscaping consists of a single tree species aligned with regular spacing where possible.

T1T2T3T4T5T6

(BV) For Boulevard. The Boulevard Frontage has slip roads on both sides. It consists of raised curbs drained by inlets and sidewalks along both sides, separated from the vehicular lanes by planters. The landscaping consists of double rows of a single tree species aligned in a regularly spaced allee.

T1T2T3T4T5T6

(RA) For Rear Alley. The Rear Alley Frontage is located to the rear of lots. It consists of a paved surface and ribbon curb at the edges adjacent to property lines or buildings. Alleys are typically not landscaped.

T1T2T3T4T5T6

(RL) For Rear Lane. The Rear Lane Frontage is located to the rear of lots. It consists of a paved surface and compacted gravel or similar material placed on the outer edges. Lanes are typically not landscaped.

T1T2T3T4T5T6

Table 5.10.060.B. Public Frontage Standards

This table assembles prescriptions and dimensions for the public frontage elements - curbs, walkways, and planters - relative to specific frontage types within transect zones. The Assembly row assembles all of the elements for the various frontage types.

Key

T# By Right

T# By Review

T# Not Allowed

Transect Zone

T1T2T3T4T5T6

T1T2T3T4T5T6

T1T2T3T4T5T6

Public Frontage Type

HW-RD-ST

RD-ST

ST-DR-AV-BV

Assembly: The principal variables are the type and dimension of curbs, walkways, planters and landscape.

Total Width

13' - 22'

13' - 22'

10' - 17'

Curb: The detailing of the edge of the vehicular pavement, incorporating drainage.

Type

Rural

Raised Curb

Raised Curb

Walkway: The pavement dedicated exclusively to pedestrian activity.

Type

Path (if provided)

Sidewalk

Sidewalk

Width

6' min.

5' min.

5' min.

Note: the placement of curb ramps shall match the desired path of pedestrian travel.

Planter: The layer which accommodates street trees and other landscape

Arrangement

Clustered

Clustered

Regular

Species

Multiple

Multiple

Multiple

Type

Continuous Planter

Continuous Planter

Continuous Planter

Width

5' min.

5' min.

5' min.

Transect Zone

T1T2T3T4T5T6

T1T2T3T4T5T6

T1T2T3T4T5T6

Public Frontage Type

ST-DR-AV-BV

CS-DR-AV-BV

CS-DR-AV-BV

Assembly: The principal variables are the type and dimension of curbs, walkways, planters and landscape.

Total Width

12' - 16'

12' - 19'

12' - 30'

Curb: The detailing of the edge of the vehicular pavement, incorporating drainage.

Type

Raised Curb

Raised Curb

Raised Curb

Walkway: The pavement dedicated exclusively to pedestrian activity.

Type

Sidewalk

Sidewalk

Sidewalk

Width

6' min.

7' min.

12' min.

Note: the placement of curb ramps shall match the desired path of pedestrian travel.

Planter: The layer which accommodates street trees and other landscape

Arrangement

Regular

Regular

Opportunistic

Species

Single/Alternating

Single

Single

Type

Continuous Planter

Continuous Planter

Tree Well

Width

5' min.

5' min.

4'-6' (tree wells located within Walkway width)

Table 5.10.060.C. Public Planting

This table shows common street tree types and their appropriateness within the transect zones. The "City of Petaluma Design and Construction Standards and Specifications" provides detailed specifications for landscaping along thoroughfares. Street Tree Species not listed below require approval by the Director.

Permitted Zones

Illustration

Recommended Species

Botanical Name

Cultivar

Common Name

Key

T# By Right

T# By Warrant

T# Not Allowed

T1T2T3T4T5T6

Tree Shape: Columnar

Spacing 20' - 35' o.c.

Acer rubrum

‘Bowhall’ or ‘Armstrong’

Bowhall or Armstrong Maple

Acer platanoides

‘Columnar’

Norway Maple

Carpinus betulus

‘Fastigiata’

Upright Hornbeam

Ginkgo biloba

‘Princeton Sentry’

Ginkgo

Pyrus calleryana

‘Glen’s Form’

Chanticleer Pear

Quercus robur

‘Skyrocket’ or ‘Crimschmidt’

Skyrocket Oak

Prunus serrulata

‘Amanogawa’

Amanogawa Cherry

T1T2T3T4T5T6

Tree Shape: Ball

Spacing 20' - 30' o.c.

Acer fremanii

‘Autumn Blaze’

Autumn Blaze Maple

Acer buergeranum

Trident Maple

Acer rubrum

‘October Glory’

October Glory Maple

Arbutus

‘Marina’

Strawberry Madrone1

Celtis australis

European Hackberry

Lagerstroemia

‘Indian tribes-mildew resistant varieties’

Crape Myrtle

Laurus nobilis

‘Saratoga’

Sweet Bay1

Magnolia grandiflora

‘compact cultivars’

Evergreen Magnolias1

Platanus acerifolia

‘Columbia’

London Plane3

Pistacia chinensis

Chinese Pistache

Oleas europea

‘Swan Hill’

Fruitless Olive1

T1T2T3T4T5T6

Tree Shape: Umbrella

Spacing 20' - 30' o.c.

Arbuts unedo

Strawberry Tree1

Celtis sinensis

Chinese Hackberry

Cercis canadensis

Eastern Redbud

Ulmus parvifolia

‘Drake’

Drake Elm2,3

Quercus agrifolia

Coast Live Oak1,4

Prunus serrulata

Umbrella formcultivars

Flowering Cherry

Acer palmatum

Umbrella formcultivars

Japanese Maple

T1T2T3T4T5T6

Tree Shape: Vase

Spacing 25' - 35' o.c.

Cercis occidentalis

Western Redbud

Acer palmatum

Vase form cultivars

Japanese Maple

Prunus serrulata

Vase form cultivars

Flowering Cherry

Zelkova serrata

Zelkova3

Ulmus parvifolia

‘Alee’

Evergreen Elm2,3

Pyrus calleryana

‘Redspire’

Redspire Pear

Koelreuteria bipinata

Chinese Flame Tree

Ginkgo biloba

‘Autumn Gold’

Ginko

T1T2T3T4T5T6

Tree Shape: Palm

Spacing 20' - 30' o.c.

Phoenix caneriensis

Canary Island Date Palm1,4

Phoenix dactylifera

Date Palm1,3

Washingtonia filifera

California Fan Palm1,3

Washingtonia robusta

Mexican Fan Palm1

All Street trees shall be planted and maintained to avoid conflicts with fire/emergency vehicles and have a minimum canopy clearance of 14’ at maturity.

1This species is an Evergreen Tree

2This species is a Semi-Evergreen Tree

3Due to the size of this species, the minimum planter width shall be 6’

4Due to the size of this species, the minimum planter width shall be 8’

Table 5.10.060.D. Public Lighting

Lighting varies in brightness and also in the character of the fixture according to the transect zones. This table shows the types of light poles and fixtures allowed within the transect zones. Within these fixture types, the City Traffic Engineer must be included in the selection of light poles and light fixtures.

Transect Zone

T1 T2 T3 T4 T5 T6

T1 T2 T3 T4 T5 T6

T1 T2 T3 T4 T5 T6

T1 T2 T3 T4 T5 T6

T1 T2 T3 T4 T5 T6

Fixture Type

Cobra Head

Pipe

Post

Column

Double Column

Key

T# By Right

T# By Warrant

T# Not Allowed