The 'Way of the LORD' in the Book of Isaiah (Library Hebrew Bible/Old Testament Studies)

What is the "way of the LORD" in the book of Isaiah?  Many scholars have adopted Walter Zimmerli's proposal that the "way" in Second Isaiah is a literal and physical highway extending from Babylon to Jerusalem only to be reinterpreted as a spiritual, metaphorical, and pious way of living in Third Isaiah.  This book will properly define each mention of the "way" in Isaiah as well as provide a coherent interpretation of this theme's theological significance within the book.

The way of the LORD is initially conceived of in the 1st half of the book as a highway leading to Zion common to both the dispersed Israelites as well as the nations.  In Isaiah, Chs 34-35 provide a paradigm of what this way will entail and its theological significance.