The "502 Standard for Road Tunnels Bridges and Other Limited Access 2020 Paperback" is a textbook authored by NFPA, focusing on safety guidelines for road tunnels, bridges, and other limited access structures. Published in 2020 by NFPA, this trade paperback book is written in English and targeted towards adult education and further education levels. It provides important insights and regulations on ensuring safety in infrastructure design and management, making it a valuable resource for professionals and students in the field.