During the past decade, Portland-area planners have embraced Transit-Oriented Development (TOD) as the region’s dominant land use/transportation strategy. They assert that TOD, especially based on light rail, will reduce traffic congestion, increase transit use, and make neighborhoods more livable. Transit-oriented development is generally defined as compact, mixed-use development that concentrates retail, housing and jobs in neighborhoods well-served by public transit. TOD has become so important to local planners that it is now the primary justification for expansion of Portland’s light rail system. Rail advocates concede that light rail is not worth the cost if it is built only as a transit system.