Explanation:

 Rajasthan has 20 national highways that passes through the state and with a total stretch of over 6373 kms. The NH-8 is the most famous national highway in the state which joins Ajmer-Jaipur-Udaipur-Chittorgarh and also the oldest one in the country with 4-8 lanes. NH-8 length is around 688 kms in the Rajasthan state.

Other national highways in the state are as follows: NH 11, NH 3, NH 11B, NH 11A, NH 14, NH 12, NH 65, NH 15, NH 79, NH 76, NH 89, NH 79A, NH 112, NH 90, NH 113, NH 116, and NH 114.