Mapbox Movement offers a detailed and privacy-forward dataset of vehicle activity, gathered from millions of mobile devices worldwide, which can be used for various analyses including transportation planning and city development. In examining the Detroit metro area, the data reveals a notable shift in traffic patterns between 2019 and 2021, with freeway traffic declining during the pandemic and local street activity increasing, possibly indicating a rise in local travel. The data's accuracy is validated by comparison with Michigan Department of Transportation (MDOT) statistics, showing a high level of agreement for the majority of road segments. Additionally, Mapbox Movement data provides more detailed insights into traffic patterns by time of day and road type, offering a nuanced understanding of vehicle activity changes over time. A specific analysis of Woodward Avenue in Detroit highlights changes in traffic volume distribution throughout the day, with a shift from traditional rush hour peaks to more evenly distributed traffic, likely influenced by changes in commuting and retail activity.