Download
1 / 8
80 likes | 149 Views
Roundabouts in the United States. Module 1 A Nationally Emerging Practice . Introduction to Roundabouts. Traffic Engineering . Traffic engineering principles are well rooted in history. PHOTOGRAPHY SOURCE: David Plazack. Sometime in the early 1800’s traffic management became an issue.
E N D
Roundabouts in the United States Module 1 A Nationally Emerging Practice Introduction to Roundabouts
Traffic Engineering Traffic engineering principles are well rooted in history. PHOTOGRAPHY SOURCE: David Plazack Sometime in the early 1800’s traffic management became an issue.
Intersections Intersections have always been a primary concern for transportation professionals. As traffic volumes increase, configuration of the intersection can be modified to accommodate traffic.
Intersection Traffic Control Early forms of intersection traffic control required the presence of a human operator. Traffic signals and pedestrian activated devices have become the preferred method to manage traffic through intersections.
Circular intersections Dupont Circle, Washington DC PHOTOGRAPHY SOURCE: United States Geographic Survey Circular intersections have been used in this country in the past.
Roundabouts: An alternative PHOTOGRAPHY SOURCE: Lee Rodegerdts The roundabout is yield controlled, traffic flows with fewer stops. Air quality also benefits when motorized traffic is kept in motion.
Roundabout Rules of the Road The rules for traveling through a roundabout are easily explained and will eventually be included in most state driver’s manuals. Special brochures also introduce these new additions to the public.
The Future of the Modern Roundabout Photo: Maryland SHA As safety and environmental advantages become recognized, roundabouts will be adopted by transportation professionals just like other technological advances.
