The explosive growth of transportation network companies (TNCs) in the last decade has posed dramatic disruptions on the taxi industry. This paper investigates how ridesourcing services impacted the taxi industry from both spatial and temporal perspectives in the city of Chicago. With the taxi data from 2014 to 2019 and TNCs data in 2019 from the Chicago Data Portal, this study summarizes the evolution and characteristics of taxi and ridesourcing trips over time, and investigates the time and mileage utilization rates of taxi trips. The result shows that the taxi utilization rate rises again from 2017 to 2019 after decreasing from 2014 to 2017. The peak utilization rates for taxi services are always witnessed during the perk period. Finally, a clustering method was implemented to capture the spatial tendency for taxi and ridesourcing services year by year. More interestingly, an increasingly "centralized" taxi service both temporally and spatially is discovered in the city of Chicago.
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