nicole j. hollopeter m.s. thesis defense...
TRANSCRIPT
Nicole J. Hollopeter M.S. Thesis Defense Presentation
This project was funded by the National Highway Traffic Safety Administration and conducted at The National Advanced Driving Simulator.
Thank you to the many individuals in the University of Iowa College of Engineering and at the National Advanced Driving Simulator who supported, assisted, and collaborated
with me on this project.
36 Participants
Young Novice (N=18)
Male
(N=9)
Left Departure Right Departure Curve Departure
Female
(N=9)
Left Departure Right Departure Curve Departure
Experienced
(N=18)
Male
(N=9)
Left Departure Right Departure Curve Departure
Female
(N=9)
Left Departure Right Departure Curve Departure
Factorial Design Lane Departure Warning System
! Provides a warning as driver departs lane boundary
! Strong steering torque in direction necessary for return to appropriate lane (6 Nm)
! Minimum speed threshold of 35 mph
! The complete block Split-‐Plot design ! Factors: Experience (teen/adult),
Treatment (BL/BR/BC) ! Potential Response Variables:
1. PeakSteerRate 2. PeakSteerJerk 3. StrReverse 4. InitSR 5. DurationOfExceedance 6. ttSR
7. SDLP 8. DeltaV 9. AreaOfExceedance 10. MaxOfExceedance 11. ttAR 12. RunOffRoad
! High Fidelity Simulator ! 400 square meters of horizontal and longitudinal
travel ! ±330 degrees of rotation ! 8 projectors, 360° of scenery & environment ! Vehicle state and driver inputs, sampled at 240 Hz
NADS-1 Dome in Bay
NADS-2 with Freightliner Heavy Truck Cab
Primary Distraction: Bug Catch
Secondary Distractions: CD Player & Trivia Game
3 Experimentally planned departures ! Drift off road to right
! Drift over centerline with incoming traffic
! Fail to keep lane in left curve entry (i.e. right departure in left curve)
Removing Events in which Warning is not Leading Indication of Departure: ! Drift abort ! Local lateral speed at departure ! Video review
Dealing with Events in which Driver Departs Opposite the Intended Direction: ! Straight Events
! Remove event if departed opposite intended direction
! Curve Event ! 19/36 departed opposite intended direction
Of the 108 data points, 28 were removed from analysis due to warning not being initial indicator or opposite departures.
Trt
Teen Drivers
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Bugle4 X X X X
Bugright X X
Bugcurve X X X X X
Trt
Adult Drivers
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Bugle4 X X X X
Bugright X X X X
Bugcurve X X X X X X X X X
X means missing.
• Data were assumed to be missing at random (complete blocks kept) • The subsetted data resulted in a complete-‐block Split-‐Plot design
Trt
Teen Drivers
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Bugle4 X X X X
Bugright X X
Bugcurve X X X X X
Trt
Adult Drivers
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Bugle4 X X X X
Bugright X X X X
Bugcurve X X X X X X X X X
X means missing.