The Texas Transportation Commission has adopted rules relating to acceptance of donations. 43 TAC ch. 1, subch. M.

For the purpose of carrying out its functions and duties, TxDOT may accept, from any source, a donation or contribution in any form, including real estate, personal property, money, materials, or services. Tex. Transp. Code §201.206.

TxDOT is authorized to exchange an interest in real property acquired but not needed for a highway purpose as whole or partial consideration for another interest in real property needed for a state highway purpose. Tex. Transp. Code §202.024.

TxDOT is authorized to acknowledge donations for highway-related services such as mowing, litter and debris pick-up, travel services, maintenance of safety rest areas, Travel Information Centers, and toll gantry facilities. 43 TAC ch. 12, subch. K.