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The two tables show the mean number of vehicles using the harbour tunnels everyday. More vehicles use the tunnels from Monday to Friday than on holidays and weekends.

Table one illustrates that on Monday to Friday, the least number of vehicles with only 2200 per hour use the Western tunnel, whereas, there are 9500 vehicles using the Central tunnel. Besides, it shows that there are 5820 per hour of vehicles using the Eastern tunnel which is greater than the Western tunnel.

On the other hand as shown by table two, there are 1500 number of vehicles per hour using the Western tunnel on holidays and weekends. At the same time, there are 4500 vehicles more in Central tunnel per hour. In addition, the Eastern tunnel has fewer than 2000 vehicles to Central tunnel.

To conclude, the frequency of using the Central tunnel is the highest among all the three tunnels. Moreover,