1. The high way contractor cannot demolish your house without any authority.
As per National highways Act, Section 3A. Power to acquire land, etc.
(1) Where the Central Government is satisfied that for a public purpose any land is required for the building, maintenance, management or operation of a national highway or part thereof, it may, by notification in the Official Gazette, declare its intention to acquire such land.
(2) Every notification under sub-section (1) shall give a brief description of the land.
(3) The competent authority shall cause the substance of the notification to be published in two local newspapers, one of which will be in a vernacular language.
They have to give a notice in writing, if not you can approach court seeking injunction against them for threatening to demolish your house property.
2. You will be eligible for compensation to the actual property that belongs to you which has been acquired by NHAI
3. You can procure the information through RTI Act
4. You may issue a notice to bank stating that they have to vacate the premises owing to the land acquisition by NHAI and induce them to obtain stay or injunction against you and the NHAI
5. Police cannot interfere, you have relief only in civil court.
6. You first confirm if you have been served notice for acquisition
7. This is a civil matter hence police cannot interfere
