timeframe_group_id,start_time,end_time,service_id
timeframe_regular,,,fare_regular
timeframe_regular,00:00:00,02:30:00,fare_free_cr_fridays
timeframe_cr_free,02:30:00,24:00:00,fare_free_cr_fridays
timeframe_cr_free,00:00:00,02:30:00,fare_free_cr_fri_past_midnight
timeframe_regular,02:30:00,24:00:00,fare_free_cr_fri_past_midnight
