Declaration of State Roads as new NHs are done from time to time keeping in view the requirements of connectivity, inter-se priority and availability of funds.
About 47,890 km length of State Roads have been approved “In-Principle” for their declaration as new NHs subject to outcome of their Detailed Project Reports (DPRs).
Initiatives have been taken for their DPR preparations. The State/Union Territory (UT)-wise details of NH density in the country is as follows :
States/ UT-wise details of NH density in the country
| Sl. No. | Name of State/U.T. | Total NH length in km | Density of NH (in km/ 1000 sq. km) | Density of NH (in km/ lakh population) |
| 1. | Andhra Pradesh | 5,961 | 36.0 | 11.9 |
| 2. | Arunachal Pradesh | 2,513 | 30.0 | 181.7 |
| 3. | Assam | 3,845 | 49.0 | 12.3 |
| 4. | Bihar | 4,839 | 51.4 | 4.7 |
| 5. | Chandigarh | 15 | 134.0 | 1.4 |
| 6. | Chhattisgarh | 3,168 | 23.4 | 12.4 |
| 7. | Delhi | 80 | 53.9 | 0.5 |
| 8. | Goa | 262 | 68.7 | 18.0 |
| 9. | Gujarat | 5,017 | 25.6 | 8.3 |
| 10. | Haryana | 2,622 | 59.3 | 10.3 |
| 11. | Himachal Pradesh | 2,641 | 47.4 | 38.5 |
| 12. | Jammu & Kashmir | 2,601 | 11.7 | 20.7 |
| 13. | Jharkhand | 2,654 | 33.3 | 8.5 |
| 14. | Karnataka | 5,974 | 31.1 | 9.8 |
| 15. | Kerala | 1,812 | 46.6 | 5.4 |
| 16. | Madhya Pradesh | 7,563 | 24.5 | 10.4 |
| 17. | Maharashtra | 7,471 | 24.3 | 6.6 |
| 18. | Manipur | 1,746 | 78.2 | 64.1 |
| 19. | Meghalaya | 1,204 | 53.7 | 40.6 |
| 20. | Mizoram | 1,381 | 65.5 | 126.6 |
| 21. | Nagaland | 1,173 | 70.7 | 59.2 |
| 22. | Odisha | 4,838 | 31.1 | 11.5 |
| 23. | Puducherry | 64 | 129.4 | 5.1 |
| 24. | Punjab | 2,769 | 55.0 | 10.0 |
| 25. | Rajasthan | 7,906 | 23.1 | 11.5 |
| 26. | Sikkim | 463 | 65.2 | 76.2 |
| 27. | Tamil Nadu | 5,038 | 38.7 | 7.0 |
| 28. | Telangana | 2,636 | 23.0 | 7.5 |
| 29. | Tripura | 806 | 76.9 | 22.0 |
| 30. | Uttar Pradesh | 8,497 | 35.6 | 4.3 |
| 31. | Uttarakhand | 2,714 | 48.6 | 26.8 |
| 32. | West Bengal | 2,956 | 33.3 | 3.2 |
| 33. | A & N Islands | 331 | 40.1 | 87.0 |
| 34. | Dadra & Nagar Haveli | 31 | 63.7 | 9.0 |
| 35. | Daman & Diu | 22 | 196.4 | 9.1 |
| TOTAL | 103,613 | 31.5 | 8.6 |