ION Phase 2 - Cambridge's Light Rail Transit

[nms]

They also think it would dramatically lower property values in Preston if the LRT passes through 

That must be based on the collapse of the property values near the LRT in Kitchener and Waterloo so far ... 

Sarcasm aside, I assume that any expropriation uses the current value of the property rather than the new value of the property once the infrastructure upgrade takes place.  I could understand that there could be some resentment if property A is expropriated for $500,000, but property B which is identical but not expropriated can be sold for $600,000 the next year due to the improved infrastructure next door.