Editing Blue Line (CTA) (section)

== Operating hours and headways ==
Like the [[Red Line (CTA)|Red Line]], the Blue Line runs 24 hours a day. Most trains run between O'Hare and Forest Park stations, but others terminate at a different station along the line. On weekdays, service runs very frequently (10–20&nbsp;tph (trains per hour)) during rush hour (with some trains running short-turn services between UIC-Halsted and Jefferson Park or Rosemont), and 6–8&nbsp;tph during the midday and nighttime.<ref name=":0">{{cite web|title=Blue Line Trains schedule|url=https://www.transitchicago.com/assets/1/6/rail-tt_blue.pdf|work=Chicago Transit Authority|publisher=transitchicago.com|access-date=December 2, 2017}}</ref>

On Saturdays, service runs 8&nbsp;tph in the early morning, then increase to 10&nbsp;tph during the day, then 8&nbsp;tph at night. On Sundays, service runs 6–8&nbsp;tph early morning, then increase to 10&nbsp;tph all day, then 6&nbsp;tph at night. On the weekends, every other Blue Line train operates between O'Hare and UIC-Halsted only during the daytime, doubling the headways up to 5&nbsp;tph. Between approximately midnight and 5:30&nbsp;a.m., [[Night service (public transport)|night owl service]] on the Blue Line ranges between 3–4&nbsp;tph.<ref name=":0" />