On a Saturday the M4 is used for days out and visits: Windsor and Legoland, shopping in Reading and Swindon, rugby and football, and family trips west.

See how the latest Saturday moved through the day in both directions. A slow hour on a Saturday is easier to spot without the weekday peaks.

The M4 on Other Days

• M4 on Mondays
  Hour by hour, westbound and eastbound
• M4 on Tuesdays
  Hour by hour, westbound and eastbound
• M4 on Wednesdays
  Hour by hour, westbound and eastbound
• M4 on Thursdays
  Hour by hour, westbound and eastbound
• M4 on Fridays
  Hour by hour, westbound and eastbound
• M4 on Sundays
  Hour by hour, westbound and eastbound

For the road right now, see the live M4 speed flow map and the latest M4 traffic news, or look up any junction on the M4 junctions page.