Large vehicles make our extension shake.

Buses are the worst for this, the number 2 passes here often (15mins or so) and without stopping the extension and out building shake, buses or any large vehicle that travel slowly don't seem to effect the building as much, if at all. However, this has potentially caused cracks in the plaster in our extension due to the excessive shaking. We've been here a year already and its pretty much a constant thing, even during the night going in to the AM when the last bus goes past (usually at 1:30am ish)