Apart from the bearings of the elevated portion of the Airport Metro Express Line, the Delhi Metro is also facing another problem. Due to the tunnels, cracks are developing on the buildings above.

The residents of the Shahbad Mohammadpur, which is a residential colony, in the vicinity of the tunnel connecting Aerocity and IGI Airport Metro stations have complained of cracks and tremors in their houses. This was when the Delhi Metro had commissioned the Central Road Research Institute to conduct a study.

According to a report submitted to Delhi Metro last week it was observed, “of the 50 observation points, only 10 per cent locations have average value of vibration around 82.5 Vdb.” The report further added, “The higher values of vibration observed in around 15 per cent of the structures could be due to a variety of factors like crossing of two Metro trains at the point of measurement, resonance of the building elements at the particular site”.

So as a measure it was suggested that running trains at the speed of 75 kmph can provide some relief to the residents. But on the other hand this is contrary to the idea of high speed link. The study has also recommended that the crossing of Metro trains near the problem areas should be avoided to ease the vibrations.