Ten Mile Road and Deer Flat Road Roundabout

The Ada County Highway District (ACHD) is designing a future multi-lane roundabout for the Ten Mile and Deer Flat intersection. The design includes the following:

• Two northbound and two southbound lanes on Ten Mile Road
• A single eastbound and a single westbound lane on Deer Flat Road (with a dedicated westbound right-turn lane)
• A 10-foot-wide multi-use pathway
• Rectangular rapid flashing beacons (RRFBs) at all crosswalks
• A truck apron for larger vehicles
• Intersection lighting
• Curb and gutter
• Bike ramps at Deer Flat/Kolnes Way to transition bikes from the multi-use pathway to the roadway
• Updated pedestrian ramps to meet current standards