Files:
- main_passengers_up.py: main file to run model for passengers up
- main_trip_duration.py: main file to run model for trip duration
- requirements.txt: list of required packages to run the code
- data/: directory with raw train/test data
- insights_plots/insights.py: directory with code to plot insights (part 3)
- preprocess/:
    - preprocess_passengers_up.py: cleaning and feature extraction for passengers up
    - preprocess_trip_duration.py: cleaning and feature extraction for trip duration
    - utils.py: shared helper functions