Montana Department of Transportation
ROUNDABOUTS
About Roundabouts
Purpose for Roundabouts
History of Roundabouts
How to Use a Roundabout
Motor Vehicle
Bicycle
Pedestrian
Frequently Asked Questions
Roundabout Locations
Roundabouts in Montana
Currently there are three single-lane roundabouts in operation on the state highway system:
In Montana City at the intersection of Jackson Creek Road and Colonial Drive (Secondary 282 and Secondary 518).
Off the new South Helena Interchange at the intersection of Saddle and Colonial drives in Helena.
On the West Reserve Loop at the intersection of Stillwater and West Reserve drives in Kalispell.
Several multilane roundabouts are in the planning stages for the Billings area.