DPW has a limited number of vehicles that can vacuum grass and leaves. Vacuum trucks cannot pick up brush and larger yard waste without clogging the vacuum tube and vacuum mechanism. If a vacuum truck is assigned to a collection route, they collect leaves and grass only, and other vehicles collect the remaining yard waste. This speeds the collection process.
If a vacuum truck is not assigned to a route, then all yard waste is collected by a bulk crew. In order to be flexible with vacuum truck route scheduling, DPW asks all residents to separate grass/leaves from brush when placing it out for collection.