Usage edit

This template creates a link to the Nevada Department of Transportation's State Maintained Highways description book. This online book is usually updated once per year and the URL frequently changes when updated. As this book is used as a source for most articles about or mentioning Nevada highways, this template provides a single place to change the URL when the yearly update is made. Currently is it just a wrapper for the URL. In the future the year field could be used to provide archive links to archived past editions.