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Zero Emission Vehicles (ZEV) is a vehicle that emits no tailpipe pollutants from the on-board source of power.


Weather Research and Forecasting (WRF) is a next-generation mesoscale numerical weather prediction system designed for both atmospheric research and operational forecasting needs.


Weight of Evidence (WOE) is a measure of evidence on one side of an issue as compared with the evidence on the other side of the issue, or to measure the evidence on multiple issues.


Western Air Quality Study (WAQS) is intended to facilitate air resource analyses for federal and state agencies in the inter-mountain western U.S. toward improved information for the public and stakeholders as a part of air quality planning including those undertaken...


Traffic Signal System Improvement Program (TSSIP), a combination of management and operations strategies designed to time and coordinate traffic signals in the Denver region.


Transportation Planning Region.