षण्णव द्वादशेति योजनान्य् ध्वा रथ्यानाम् पञ्च योजनान्यर्धाष्टमानि दशेति पृष्ठवाहिनामश्वानामध्वा ॥ कZ_०२.३०.३९ ॥
ṣaṇṇava dvādaśeti yojanāny dhvā rathyānām pañca yojanānyardhāṣṭamāni daśeti pṛṣṭhavāhināmaśvānāmadhvā
The travel-distance (standard stages) for chariot-road horses is 6, 9, or 12 yojanas; for back-borne (saddle/pack) horses it is 5, 7½, or 10 yojanas.
To manage fatigue and prevent loss of state assets by overwork, while enabling predictable scheduling for military and administrative transport.