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28 M.S. MERDİVENCİ, A.G. AVCI, B. BARLAS

Table 1: The specifications of VW Passat Variant

Engine Output 85.75 kW

Wheelbase 2709 mm

Tire Size 205/55 R16

Front Suspension The depreciated rack

Rear Suspension Helical spring

The main objective of our experiments was to analyse the quality of roads in Istanbul Technical
University Ayazaga campus with a car. During our cruise in ITU campus we have met 14 of

speed bump and we turned 15 road bends. The loop for driving over different road surfaces is
shown in Figure 2. The road sections include asphalt, only some parts of it has rough gravel
surface and short slopes. The length of the loop is around 3.5 km. The speed bumps were fixed
on a smooth asphalt road. All speed bumps have the same dimensions. The height of the
obstacle is 0.08 m; the width is 0.5 m; and the length is 5m as shown in Figure 3. During our
cruise on 10th of March 2015 in ITU campus we have met 14 speed bumps. While passing by
on different speed bumps we have met different acceleration values.

Figure 2: The aerial view of the test route at ITU Ayazaga Campus
GiDB|DERGi Sayı 3, 2015