This research investigates the impact of residential parking on household travel behavior in transit under-served areas (TUSA) in the New York City region. It focuses on an important but often overlooked issue in reshaping the travel pattern in TUSA neighborhoods- residential parking. It finds that TUSA households with only on-street parking tend to have fewer cars, make fewer vehicle trips, and drive less overall VMT, compared to households with a garage. However, when on-street parking becomes a viable alternative to off-street parking--free, convenient, and readily available, households tend to have more cars and use these cars more often.