Arlington County, Virginia The Ideal Width Of Neighborhood Streets - - PowerPoint PPT Presentation

Arlington County, Virginia

The Ideal Width Of Neighborhood Streets For An Urban Village

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Challenge

To balance the needs of:

• All transportation users
• Transportation functionality and

neighborhood livability

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Considerations for the Standard

• Lane width
• Parking widths and parking

allowances

• Traffic volumes
• Intersection radii
• Neighborhood density
• Snow removal
• Required Access for larger vehicles,

such as buses, refuse trucks and emergency response vehicles

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Wide Streets Wide Streets

• Can encourage speeding
• Increase impervious area
• May reduce the livability of a

residential street

• Undermine perceived

pedestrian/cyclist safety

• Inconsistent with residential traffic

patterns

• Higher maintenance costs

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Narrow Streets

• May inhibit emergency response
• Can constrain snow plowing
• perations
• May discourage free flowing traffic
• Reduces vehicular speed
• Can improve pedestrian and cyclist

safety

• Reduce maintenance and operation

costs

• Less impervious area

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Existing Parking Lane Widths

Roadway Width Parking Lane Width Criteria

23 Ft. Street 8’ – One On-Street Parking Lane 15’ – Two Motor Vehicle (Yield) Travel Lanes 26 Ft. Street 14’ – Two 7’ On-Street Parking Lanes 12’ – Two Motor Vehicle (Yield) Travel Lanes 30 Ft. Street 16’ – Two 8’ On-Street Parking Lanes 14’ – Two Motor Vehicle (Yield) Travel Lanes 32 Ft. Street 8’ – One On-Street Parking Lane 24’ – Two 12’ Motor Vehicle Travel Lanes

• r

16’ – Two 8’ On-Street Parking Lanes 16’ – Two Motor Vehicle (Yield) Travel Lanes 34 Ft. Street 14’ – Two 7’ On-Street Parking Lanes 20’ – Two 10’ Motor Vehicle Lanes 36 Ft. Street 14’ – Two 7’ On-Street Parking Lanes 22’ – Two 11’ Motor Vehicle Lanes

• r

16’ – Two 8’ On-Street Parking Lanes 20’ – Two 10’ Motor Vehicle Lanes

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Some Cities With Narrow Two Way Streets

Jurisdiction Total Width Parking Travel Width

Albany, Oregon 30 Both Sides 16 Beaverton, Oregon 28 Both Sides 12 Birmingham, Michigan 26 Both Sides 10 Boulder, Colorado 30 Both Sides 14 Burlington, Vermont* 18 None 18 Denver, Colorado 20 One Side 12 Eugene, Colorado* 21 One Side 21 Forest Grove, Oregon* 26 Both Sides 26 Helena, Montana 33 Both Sides 17 Howard County, Maryland* 26 Both Sides 26 Loomis, California 24 One Side 16 Mountain View, California 27 Both Sides 11 Phoenix, Arizona 28 Both Sides 12 Portland, Oregon 26 Both Sides 12 Roanoke, Virginia 26 Both Sides 12 Virginia Beach, Virginia 28 Both Sides 14 * Jurisdiction has unregulated parking. Assume 7-ft parking on each side of the roadway.

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Parked Car Space in Arlington County?

For residential areas: Average space from curb to driver’s side mirror was 7’2” Some interesting upper percentiles are:

• 7’5”

70th percentile

• 7’6”

75th percentile

• 7’9”

85th percentile For commercial areas: Average space from curb to driver’s side mirror was 7’2” Some interesting upper percentiles are:

• 7’4”

70th percentile

• 7’5”

75th percentile

• 7’8”

85th percentile Note: Surveyed 100 parking locations throughout the County

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Standard Arlington County Fire Truck Dimensions

Fire Engine Ladder truck

Truck Width - 9.5’ (Mirror to Mirror) Truck Width - 14’ (Door to Door) Truck Width With Extension Legs - 17.5’

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Fire’s List of Narrow Two Way Streets

Street Name Block Width (ft) Parking S 13th Rd 3500 13 No N 22nd St 4007 13 No N 25th St 2700 13 No N Edgewood St 2400 13 No S 6th St 5600 18 One N Beechwood St 2800 18 No N 19th St 4400-4500 23 Both N 21st St 3100 23 Both S Harrison St 300 23 Both N Stafford St 2900 24 Both N 22nd St 3200, 3500 25 Both N 23st St 4100 25 Both N 3rd St 2800-2900 25 Both N Colonial Terr 1600 25 Both S Lincoln St 2100 25 Both N Lynbrook Dr 1300 25 Both N Nelson 2200 25 Both N Pollard St 2100 25 Both N Quebec St 2120 25 Both N Quinn St 1200 25 Both N Upton St 2200 25 Both

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The Fire Code

Virginia Statewide Fire Protection Code (SPFC) - Section 103.1 states “the International Fire Code is adopted and incorporated by reference IFC.” IFC states “fire access road shall have an unobstructed width of at least 20 feet.” Section 106.5 states “the fire official may grant modifications to any provision of the SPFC…”

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Emergency Routes

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18 FT. TWO WAY - RESTRICTED PARKING

DOT Proposed Narrow Street Example 18 Feet - No Parking

2800 Block Beechwood Place 18’ No Parking Allowed

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DOT Proposed Narrow Street Example 21 Feet - Parking One Side

North 14th Street @ Buchanan Street 21’ Parking One Side

YIELD TRAVEL LANES ON STREET PARKING 7 FT. 14 FT.

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DOT Proposed Narrow Street Example 28 Feet - Parking Both Sides

2300 18th Street North 28’ Parking Both Sides

YIELD TRAVEL LANES 14 FT. ON STREET PARKING 7 FT. ON STREET PARKING 7 FT.

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North 21st Road @ Glebe Road

10’-9” Mirror to Mirror

DOT Recommendation No Parking Expected 18’ Parking One Side 21’ Both Sides 28’ Fire Recommendation No Parking Expected 20’ Parking One Side 28’ Both Sides 36’ Fire Truck Dimension = 17.5’ (Legs Extended)

Midblock restrictions every 150-200’ when driveways are not present

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North 21st Road @ Glebe Road

14’ Door to Door 24’ Curb to Curb

DOT Recommendation No Parking Expected 18’ Parking One Side 21’ Both Sides 28’ Fire Recommendation No Parking Expected 20’ Parking One Side 28’ Both Sides 36’ Fire Truck Dimension = 17.5’ (Legs Extended)

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No Parking Zones for Streets without Driveways North 21st Road @ Glebe Road

Midblock restrictions every 150-200’ when driveways are not present

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700 Block North Emerson Street

26’ Curb to Curb 5.5’ 6.5’ 14’

Driveway Note: Car Widths Measured From Driver’s Side Mirror To Curb

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No Restrictions for Street with Driveways 700 Block North Emerson Street

Midblock restrictions not necessary when driveways are present

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3000 Block North 9th Road

Note: Soft shoulder on left Curb on right 30’ Shoulder to Curb 7’-6” 7’

DOT Recommendation No Parking Expected 18’ Parking One Side 21’ Both Sides 28’ Fire Recommendation No Parking Expected 20’ Parking One Side 28’ Both Sides 36’ Fire Truck Dimension = 17.5’ (Legs Extended)

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3000 Block North 9th Road

17’-6” With Leg Extensions

DOT Recommendation No Parking Expected 18’ Parking One Side 21’ Both Sides 28’ Fire Recommendation No Parking Expected 20’ Parking One Side 28’ Both Sides 36’ Fire Truck Dimension = 17.5’ (Legs Extended)

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What The Fire Department Wants

• 20 feet clearance

with no

• bstructions
• Grass strips,

mountable curbs,

• etc. are okay

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800 Block North Kenmore Street

36’ Curb to Curb

DOT Recommendation No Parking Expected 18’ Parking One Side 21’ Both Sides 28’ Fire Recommendation No Parking Expected 20’ Parking One Side 28’ Both Sides 36’ Fire Truck Dimension = 17.5’ (Legs Extended)

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DOT / Fire Recommendations for Narrow Streets

Criteria DOT Fire Department

No Parking Expected 18’ 20’ Parking - One Side Only 21’ 28’ Parking Both Sides 28’ 36’

Proposed narrow residential streets must have daily volumes of less than 1500 vehicles per day. All recommendations are based on curb-to-curb dimensions

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County Manager’s Recommendation

Criteria Standard Width

No Parking Expected 20’ Parking - One Side Only 21-26’ Parking Both Sides 28-32’ Transportation recommends the lower width as the standard and the use of midblock parking restrictions where necessary unless otherwise requested by emergency management services.