Street sweeping vehicle

Construction of a Mock-up. A mock-up is a static test structure which accurately represents the spatial arrangement of the proposed design. The mock-up does not need to be functional displays may be drawn on cardboard and controls may be made from wood or other easily worked materials. The mock-up is used to test the spatial arrangement for example, to make sure that all displays and controls lie within the field of vision and the reach envelope, respectively. The advantage of a mock-up is that problems as well as appropriate solutions may become evident, which would not be detected if the examination was limited to drawings or other documents. Figure 6.68 shows the mock-up of the cab of a street sweeping vehicle which was built for the optimization of the driver s seat and vision. 

The workplace cab of a street sweeping vehicle has a number of special problems associated with it. These include the problem of sweeping while driving in the midst of traffic as well as the unfavorable environmental conditions of noise, dust, and external weather. When reversing, the limited visibility from the cab presents a particularly important safety problem. 

Figure 6.77 shows the distribution of the driver s lines of sight in two examined types of street sweeping vehicle. It can be seen that the observation of the circular brush in sweeping vehicles with a truck chassis takes up more than twice as much time as with the three-wheeled type of sweeping vehicle. This is attributable to the fact that on the conventional type of vehicle the circular brush is positioned behind the driver s cab and is observed either in the outside mirror or through the window (see Figure 6.78), On the three-wheeled vehicle the circular brish is arranged in front of the cab and can be observed easily and directly through a special...

Figure 6.78 Street sweeping vehicle with truck chassis and standard manufacture track cab (Kuka type 246. The illustration shows a prototype from the Berlin Sanitation Department equipped with air conditioning and television cameras.

For the development of a new street sweeping vehicle a mock-up was built (see Section 6.3.2). By means of this mock-up the spatial arrangement of the cab s interior and the visibility could be optimized. 

Figure 6.79 Three-wheeled street sweeping vehicle with specially constructed cab...

Figure 6.80 Interaction of the most important factors within the problem complex street sweeping vehicle cab. ...

Special wastes. Wastes such as street sweepings, roadside litter, catch-basin debris, dead animals, and abandoned vehicles are classified as special wastes. 

A large part of the lead deposited in the street surface from vehicle exhausts becomes incorporated in the street dust. It is then transported during a runoff event as a suspended solid. Street sweeping, often vacuum assisted, removes solids from the street surface and thus reduces the lead available for runoff. There remains, nevertheless, the problem of disposal of the contaminated street dust. 

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