According to Table 2, it is interesting to find out that the highest wind speed ratios in the four tunnels may not always occur when the wind strikes the building perpendicularly to the tunnels. The results show that for the northerly winds, the maximum values of the wind speed ratios normally occur when winds originate from ±15.Likewise, for the southerly winds, the critical wind azimuths characterized with the highest wind speed ratios are ±5 to the tunnel‘s central axis