25 CFR §170.402

1. (a)All Tribes must prepare a TTIP or Tribal priority list.
2. (b)Tribes operating with a Program Agreement or BIA self-determination contract, TTP agreement, or self-governance agreement may assume any of the following planning functions:
   1. (1)Coordinating with States and their political subdivisions, and appropriate planning authorities on regionally significant TTP projects;
   2. (2)Preparing NTTFI data updates and ensuring that the data is entered into the NTTFI;
   3. (3)Facilitating public involvement;
   4. (4)Performing traffic studies;
   5. (5)Developing short- and long-range transportation plans;
   6. (6)Mapping;
   7. (7)Developing and maintaining Tribal management systems;
   8. (8)Participating in transportation planning and other transportation related meetings;
   9. (9)Performing transportation planning for operational and maintenance facilities;
   10. (10)Developing TTP budgets including transportation planning cost estimates;
   11. (11)Conducting special transportation studies, as appropriate;
   12. (12)Researching rights-of-way documents for project planning; and
   13. (13)Performing preliminary project planning or project identification studies.