Access Management Solutions with Roundabouts

• Authored by:  Hillary Isebrands
• Co-authored by:  Mark Johnson
• Event:  2010 National Conference on Access Management

Well-designed Modern Roundabouts enhance the achievement of Access Management principles

• Maintain Integrity of Arterials
• Balance Mobility and Access
• Improve Safety
• Reduce Congestion
• Extend the life of Infrastructure

Roundabout Operational & Safety Characteristics:

• Driveway and intersection spacing versatility
• Geometric flexibility (properly designed)
• Less queuing
• Slower & consistent speeds
• Reduces speed differentials
• Less conflicts

System Effects of Roundabouts

• Roundabouts work well in series
• Roundabouts and signals are compatible
• Roundabouts may reduce the need for expensive roadway or structure widening
• Roundabouts provide substantial flexibility for driveways and side street spacing and design