You will be driving a path you are unfamiliar with while hauling hazardous materials. When should you examine your route and any required permits?

Some states and counties require permits to transport hazardous materials or wastes. They may limit the routes you can use. Local rules about routes and permits change often. It is your job as driver to find out if you need permits or must use special routes. Make sure you have all needed papers before starting. [CDL Handbook]