Fair Compensation and Transparency in Land Acquisition

I am a resident of Palani Taluk ,Dindigul district of Tamilnadu. I have three cents of land in which we have our home along the NH209 at Thalaiyuth. As per the news i heard from the Taluk office all of my property will be acquired for the widening of the highway. But on an RTI filed on this ,highway development authority of India replied that there is no such plan before the authority. Inquiring in the Taluk office again about this they said they don't know anything about this and they were hesitated to say whom to meet and what to do to know the project and also the amount compensation that they are going to pay. I am in a confusion when land is acquired for such a big project the authority / government should inform the details of compensation and time duration etc. before hand to the affected people. So I feel (1) Lack of transparency and (2) Hidden agendas in this project, We are living in this place for more than 30 years . Where should i approach for the correct information.