Hey! Where in the h-e-double-hockey-sticks did that roundabout come from?

Kennewick PD facebook page reveals:

At 2:55am this morning some of you may have been awakened to the sound of Alexander Tanner driving his vehicle through the roundabout on W. 4th Ave and Kellogg Street. He was traveling eastbound on W. 4th Ave. and apparently did not notice the roundabout in time and went straight through it. After investigation it was determined that his ability to operate the motor vehicle may have been slightly impaired. Tanner was arrested for DUI (along with 4 warrants) and booked into the Benton County Jail.