Conducted by: Tyler Womble

“A place where two or more roads meet, especially when at least one is a major highway” Can be regulated by: Stop Signs Traffic Signals Roundabouts Intersections A roundabout located in Germany.

Developed 1963 in England 1990 first use in U.S. was Las Vegas 3,700 throughout the U.S. (As of December 2013) Despised throughout the U.S. by drivers Roundabouts

“The supervision of the movement of people, goods, or vehicles to ensure efficiency and safety” Developed in 1868 in England First use in U.S. was 1910 Pedestrian crossing signs appeared in 1952 in New York Traffic Signals

Roundabouts Vs. Traffic Signals Subcategories: Construction Safety Efficiency Design Ease of Navigation Maintenance Costs Point of Disagreement

Public Perception - Roundabouts

Roundabouts - Construction Cheaper construction costs than signalized intersection Causes shut-down of entire intersection Geometry is extremely important Extremely low injury rate Landscaping

A little more expensive than roundabout 1.4 million compared to 1.35 million Intersection can remain open during final stages Electrical devices, sensors, and equipment must be installed Pedestrian stoplights Signals - Construction

2.6 times more likely to collide than at a signal Injury causing collisions same as signals.04 pedestrian collisions per roundabout per year 1 cyclist collision every 14 years per roundabout Roundabouts - Safety

3 times more likely to be killed than while at roundabout Injury causing collisions same as roundabouts pedestrian collisions per year 1 cyclist collision every nine years per signal Signals - Safety

No form of control compared to signals A new form of traffic control to U.S. drivers 20% reduction in delays from signals 56% reduction in vehicle stops Roundabouts - Efficiency

Green time is adjusted to fit flow of traffic Easier for drivers to make maneuvers Pedestrian crossing is adjusted easily Requirements of drivers is easily identified Signals - Efficiency

Costs less than signals Designs lacks Signal timings Electrical engineering Signal design Signal Timings Roundabouts - Design

Warrants are easily listed and described Geometry is easy to configure Turn Lanes and protection Dilemma zones must be avoided Signals - Design

Causes many collisions Side swipes are frequent Speed reduction Drivers must be alert Drivers must focus Roundabouts - Navigation Federal Highway Administration

Drivers are comfortable with situation Green means go, Red means stop Yellow lights cause driver confusion Signals - Navigation

Reduce maintenance costs No hardware or electrical maintenance required Landscaping Water Runoff Roundabouts - Maintenance

Electrical Maintenance Required Changing of signal times Greater maintenance cost than roundabouts Signals - Maintenance

Lost time in design Driver Education Construction Crew knowledge Consequences

More roundabouts to come! More driver education Better Results Community Forums Events