X4
Union Ave
To BioLife and Aurora, about 2.6 mi.Every 20 min by day. Every 30 min evenings. 5 AM to 12:30 AM, seven days.
Riding is free. Just get on.No fares, no passes, no cards. Every bus, every rider, every day.
Union Ave: every 20 min day, every 30 min evening, 5 AM to 12:30 AM every day

Stops
- S 8th St
- T2 14th St
- BioLife
- Aurora Medical Center at S Taylor
Key stops along the corridor. Filled dots are Longevity Hubs.
Timetable
Sample schedule Frequencies and service hours come from the plan. Clock times are generated from those frequencies to show how the timetable could look. Stop-by-stop minutes are spread evenly over the run.
Every day, Sundays and holidays included
Every 20 min until 7 PM, then every 30 min. 5:00 AM to 12:00 AM.
| From S 8th St | Time |
|---|---|
| First trip | 5:00 AM |
| Last trip | 12:00 AM |
Stop-by-stop minutes TBD.
All 53 departures from S 8th St
5:00 AM5:20 AM5:40 AM6:00 AM6:20 AM6:40 AM7:00 AM7:20 AM7:40 AM8:00 AM8:20 AM8:40 AM9:00 AM9:20 AM9:40 AM10:00 AM10:20 AM10:40 AM11:00 AM11:20 AM11:40 AM12:00 PM12:20 PM12:40 PM1:00 PM1:20 PM1:40 PM2:00 PM2:20 PM2:40 PM3:00 PM3:20 PM3:40 PM4:00 PM4:20 PM4:40 PM5:00 PM5:20 PM5:40 PM6:00 PM6:20 PM6:40 PM7:00 PM7:30 PM8:00 PM8:30 PM9:00 PM9:30 PM10:00 PM10:30 PM11:00 PM11:30 PM12:00 AM
One schedule every day, Sundays and holidays included. Last trips finish by 12:30 AM. From 12:30 AM to 5:00 AM, late-night on-demand (Zone E) takes over.