This chapter focuses on the impacts of traffic congestion in the daily life of metropolitan motorized households. It is based on a doctoral dissertation defended in 2012, which studied three megacities: Paris in France, Sao Paulo in Brazil and Mumbai in India. A stated-adaptation survey was conducted in 2009–2010 to identify behavioral responses to traffic congestion and to estimate the threshold of household tolerance to congestion in the three regions. The implemented stated-adaptation survey was based on increasing the travel time. It allowed us to comprehend behavioral responses to traffic congestion. The survey had two stages: the respondent filled up a trip diary listing all trips, no matter what purpose or mode of transport was used, for several consecutive days, and during an in-depth face-to-face interview, the respondent reacted to hypothetical situations based on selected trips from the trip diary.