"Consistency" means that no feature of a plan or regulation is incompatible with any other feature of a plan or regulation. Consistency is indicative of a capacity for orderly integration or operation with other elements in a system.

"Department" means the department of transportation (WSDOT).

"Least cost planning" means a process of comparing direct and indirect costs of demand and supply options to meet transportation goals and/or policies where the intent of the process is to identify the most cost-effective mix of options.

"Level of service" means an established minimum capacity for both transit and regional arterials that must be provided per unit of demand or other appropriate measure of need.

"Organization" means regional transportation planning organization (RTPO).

"Region" means the area that includes the local jurisdictions that comprise the regional transportation planning organization.

"Urbanized area" means those areas designated as such by the U.S. Bureau of the Census.

"Urban growth areas" means those areas designated by a county pursuant to RCW 36.70A.110.