This document provides results of an analysis of commuter transportation assis-tance services offered by the Commuter Connections program of the TPB to commuters and employers in the Washington, DC region. This report estimates transportation and air quality impacts on Commuter Connections’ services. Data for this analysis was collected in 2011 through telephone surveys of 892 respon-dents randomly selected from the Commuter Connections applicant database. The survey collected data for the July 1 through September 30, 2011 quarter.