Source: Turkish Directorate of Highways
Figure 7. The highway network in Turkey
To obtain information about the relations among the cities, traffic flow in 1992 is given in
figure 8. As can be seen from this figure, the traffic flow in the Istanbul region is the highest,
with a peak value around Istanbul. The following dense traffic flows are found in Ankara in
the center, Izmir in the West and Icel in the South.
Source: Turkish Directorate of Highways
Figure 8. The traffic flow in Turkey in 1992
However, not only the regions with positive firm growth rates are located on main highways
of Turkey, but also there are some regions with negative firm growth rates and very dense
traffic flow. To explain those regional variations on the growth rate of firm, the study is