N.M. Stat. § 67-3-60
The purpose of Sections 67-3-60 and 67-3-61 NMSA 1978 is to foster and insure the correlation of state highway construction programs closely affecting smaller municipalities and unincorporated communities with the future economic growth, livelihood, development, safety and general welfare of the communities by limiting the use of public funds for the construction of highway bypasses or relocation projects diverting traffic and commerce from existing state highway routes through the communities in accordance with the provisions of all existing agreements between a municipality or county and the state transportation commission relating to obtaining the consent of the municipality or county pursuant to the provisions of Section 67-3-61 NMSA 1978.
NMS § 67-3-60