Road widening in south ga

I recently purchased my home in cash, back in march. in which there was talks about road widening project may existence. due to the nature of the home being auction off, the state DOT never took advantage of it, all those months it stayed on market. now that i purchased and upgraded and remolded. they have made there appearance about the road widening. with offering me less than what i even paid for my home . that really irritates me. i stay on a two lane major road that they want to make a 4 lane. but even the way they trying to take the land and home, there is almost a lane and half worth of dirt /ditch across from my home, and the same in front of home with a give or take of about 30yds from ditch to my home . so why would you try to take the 4 home in my lil area on our 1 acre of land each? why the state feel lke my home is worth less than what i paid for it? when we all know the housing market isnt at a low and finding a home that needs no repairs will not be in the price they just tried to offer me. i am ready for court with this cause i cant allow this to go there way cause they say so.