The primary textbook by (often co-authored with Dr. N.B. Lal ) is titled Principles and Practices of Highway Engineering
If you're unable to find the PDF, you might consider purchasing the book or borrowing it from a library. Many educational institutions have copies of this textbook in their libraries.
The book starts with the history of road development in India, from the ancient period to the modern National Highway Development Project (NHDP). It details the classification of roads (National Highways, State Highways, District Roads) which is a frequent topic in competitive exams.
His vast experience in highway planning and his involvement in framing IRC codes make his writing uniquely practical. Unlike many theoretical textbooks, Kadiyali’s work bridges the gap between classroom theory and on-site application.