A distinction is made between the macadam streets in the residential districts and the hard-surface streets in the business district. The macadam streets in the residential districts are cleaned, on an average, fifteen times during the year. Over a period of eleven years, the number of times the streets have been cleaned has increased from eight to fifteen per year.
These tabulated costs include sweeping, collecting and hauling to the dump, but do not include depreciation or interest on the investment.
The expenditure per month for street cleaning varies during the year. It has been found that the expenditure in July, per mile of street, is approximately $11, when a street-cleaning problem in Berkeley, Calif.-
A deep gutter which requires hand operations at present. A program of filling the gutters will soon permit machine cleaning instead of present hand cleaning with the equipment shown
reas, during March and April, the cost is approximately $9 per mile. Over a period of 5 years the average length of street cleaned per man per day is 0.93 miles. Some men sweep as little as 3,200 feet per day, and other sweepers cover as much as 8,300 feet per day.
Twenty-eight miles of permanently paved streets have been patrolled by 10 men sweeping by hand. Business districts have been patrolled from four times per day, in the downtown section, to once per day, in the outlying business districts. Certain main business centers are cleaned every day of the year, including Sundays and holidays.
Because of the congestion due to the parking of automobiles, the street sweepers begin at 3:30 o'clock in the morning in the downtown sections, and 6:00 o'clock in the morning in the outlying districts. The cost per mile on permanently paved streets is $1.59 and varies with the conditions to be met