Applying Street Cleaning:Applying Street Cleaning:

Modeling to Represent Monitored Modeling to Represent Monitored ResultsResults

Caroline Burger, P.E.Caroline Burger, P.E.Earth Tech, Inc.Earth Tech, Inc.

Factors to ConsiderFactors to Consider5-year Rainfall Files

Winter Season Date Range

Street Texture

Street Cleaning Frequency

Type of Street Cleaner

Street Cleaner Productivity

Parking Density

Parking Controls

Rainfall DataRainfall Data

Duluth

Green Bay

MilwaukeeMadison

Minneapolis

•Use 5-year rainfall files

•Use Winter Season Date Range

•Parameter files and Winter Season Information can be found on the USGS website

Street Cleaning FrequencyStreet Cleaning Frequency

One Pass Every Two Weeks

One Pass Every Week

Type of Street CleanerType of Street Cleaner

Vacuum Assisted & Regenerative Air Are Modeled the SameVacuum Assisted & Regenerative Air Are Modeled the Same

Mechanical Broom Regenerative Air

Vacuum Assisted

Street Cleaner ProductivityStreet Cleaner Productivity

Use “1. Coefficients based on street texture, parking density, and parking controls”

Parking DensitiesParking Densities

None: No ParkingLight: 1 or 2 cars per blockMedium: Cars in approx. 50% of available parkingExtensive: Cars in more than 90% of available parking

Medium

None

Extensive

Parking ControlsParking Controls

Can the Street Cleaner Reach the Curb?If cars are not allowed to park on the street during cleaning times, or if streets are cleaned when cars are usually not on the streets, the answer is “yes”.

AlleysAlleys

Note:Alleys are considered streets in the SLU files.

The model assumes street cleaning is applied to alleys.

Therefore, if you do not want to model alleys as being cleaned, the alleys must be separated in the .dat file.

Street Cleaning EfficienciesStreet Cleaning Efficiencies

Type of Land Use

Parking Density

Broom Street

Cleaner

Vacuum Assisted Cleaner

Med. Den. Res.

Light 7% 18%

Strip Comm. None 10% 20%

Shopping Ctr.

None 3% 6%

Land UseParking Density

With Parking Controls

Without Parking Controls

Med. Den. Res.

Med. 20% 8%

Strip Com. Med. 19% 8%

Downtown Ext. 17% 13%

Street Cleaning EfficienciesStreet Cleaning EfficienciesVacuum Assisted Street Cleaner

Frequency: 1 / week

Cleaning Frequency

Broom Street Cleaner

Vacuum Assisted Street Cleaner

Light Parking

Medium

Parking

Light Parking

Medium

Parking1 \ Month 3% 2% 8% 7%

1st 6 weeks – 1 \ Week; Remaining Season - 1 \ Month

9% 7% 17% 14%

1 \ Week 9% 7% 22% 18%

Street Cleaning EfficienciesStreet Cleaning EfficienciesMedium Density Residential No Alleys Land Use

Typical Community-Wide ResultsTypical Community-Wide Results

Mechanical Broom = 3 – 6 %

Vacuum Assisted = 5 – 10 %

Street Cleaning Program

Downtown cleaned 1 / week

Remainder of city cleaned 1 / 2 weeks or 1 / month

Parking densities and parking controls varied based on land use

““Spring Cleaning”Spring Cleaning”

Aggressive Spring Cleaning Schedule

Once per week for at least 6 weeks

Schedule returns to normal after “Spring Clean-Up”

Start as soon as snow melts

Clean Entire community

Vacuum Assisted Cleaner

Average reduction 12 - 16 % community-wide

Questions?Questions?

Applying Street CleaningApplying Street CleaningStreet Cleaning Form

Applying Street CleaningApplying Street CleaningWinter Season Date Range Activates Calibrated Coefficients

Applying Street CleaningApplying Street CleaningStreet Source Area Only Output

Applying Street CleaningApplying Street CleaningDowntown SLU File with Street Cleaning

Applying Street CleaningApplying Street CleaningDowntown SLU File with Street Cleaning - Output