CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting ROUNDABOUT EXPERIENCE IN NEVADA AFTER 20 YEARS SAMUEL KOFI AHIAMADI Graduate Student University of Nevada, Reno 1

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting Outline  Introduction  Data Collection Methods  Observations  Data at Selected Roundabouts  Conclusions and Recommendations 2

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting  First Modern roundabout built in the UK  Spreads to France, Germany, Australia etc  Introduced to the United States 1990 (Las Vegas)  Currently over 2000 roundabouts across the US in more than 40 States 3Introduction

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting Objective The objective of this paper is to discuss observations made at selected roundabouts related to vehicle and pedestrian safety, capacity and delayThe objective of this paper is to discuss observations made at selected roundabouts related to vehicle and pedestrian safety, capacity and delay 4

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting  The following procedure were used Video RecordingVideo Recording Radar Speed Gun for Speed MeasurementsRadar Speed Gun for Speed Measurements Crossing and Observing Driver BehaviorCrossing and Observing Driver Behavior 5 Data Collection Methods

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 6Observations  Speeding Drivers

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting  Hesitant Drivers 7Observations

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 8Observations  Stopping in the Circulating lane

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 9Observations  Illegal Turning Movement

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 10Observations  Pedestrian Issues Drivers are unwilling to stop for pedestriansDrivers are unwilling to stop for pedestrians For two-lane roundabouts, one driver stops and the adjacent driver does not stopFor two-lane roundabouts, one driver stops and the adjacent driver does not stop Very challenging for the blind and elderlyVery challenging for the blind and elderly

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 11 Speed Data  MEASURED SPEEDS FOR VEHICLES AT SELECTED ROUNDABOUT

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 12 Crash Data  NDOT, 2011  Crash Data For Selected Roundabouts In Nevada

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting  Failure to yield right of way  Failure to maintain lane  Driving too fast  Unsafe lane change  Improper turn 13 Causes of Crashes

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting Roundabout Type Critical HeadwayFollow-up Headway Nevada Data National Average Nevada Data National Average Single Lane (3.9) (5.1) (3.2) Double-Lane Left Lane (4.9) (4.5) (3.4) Right Lane (4.8) (4.2) (3.1) 14 Preliminary Data From Research

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 15Conclusions  Significant number of drivers continue to speed when approaching and negotiating roundabouts  Drivers are unwilling to stop for pedestrians  Unsafe driver behavior still exist at roundabouts

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 16Recommendations  Need for public education for any newly installed roundabout  DMV’s should consider testing new drivers around a roundabout  Increasing Roundabout information on NDOT website with Video demonstrations  Experimenting with touch button flashers for pedestrians

CATER-Center for Advance Transportation Education and Research University of Nevada, Reno 2012 ITE Western District Annual Meeting 17 QUESTIONS ? THANK YOU