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CEVMS and Driver Visual Behavior Study - Peer reviewed report

Table of Contents

List of figures

Figure 1Eye tracking system camera placement.
Figure 2FHWA's field research vehicle.
Figure 3DCZ with a target CEVMS on a freeway.
Figure 4DCZ with a target CEVMS on an arterial.
Figure 5DCZ with a target standard billboard on a freeway.
Figure 6DCZ with a target standard billboard on an arterial.
Figure 7DCZ for the control condition on a freeway.
Figure 8DCZ for the control condition on an arterial.
Figure 9Screen capture showing static ROIs on a scene video output.
Figure 10Mean feature congestion as a function of advertising condition and road type (standard errors for the mean are included in the graph).
Figure 11Distribution of fixation duration for CEVMS in the daytime and nighttime.
Figure 12Distribution of fixation duration for standard billboards in the daytime and nighttime.
Figure 13Distribution of fixation duration for road ahead (ie, top and bottom road ahead ROIs) in the daytime and nighttime.
Figure 14Heat map for the start of a DCZ for a standard billboard at night on an arterial.
Figure 15Heat map for the middle of a DCZ for a standard billboard at night on an arterial.
Figure 16Heat map near the end of a DCZ for a standard billboard at night on an arterial.
Figure 17Heat map for start of a DCZ for a standard billboard at night on a freeway.
Figure 18Heat map for middle of a DCZ for a standard billboard at night on a freeway.
Figure 19Heat map near the end of a DCZ for a standard billboard at night on a freeway.
Figure 20Heat map for the start of a DCZ for a standard billboard in the daytime on a freeway.
Figure 21Heat map near the middle of a DCZ for a standard billboard in the daytime on a freeway.
Figure 22Heat map near the end of DCZ for standard billboard in the daytime on a freeway.
Figure 23Heat map at the end of DCZ for standard billboard in the daytime on a freeway.
Figure 24Example of identified salient areas in a road scene based on bottom-up analysis.
Figure 25Example of a CEVMS DCZ on a freeway.
Figure 26Example of CEVMS DCZ an arterial.
Figure 27Example of a standard billboard DCZ on a freeway.
Figure 28Example of a standard billboard DCZ on an arterial.
Figure 29Example of a control DCZ on a freeway.
Figure 30Example of a control DCZ on an arterial.
Figure 31Mean feature congestion as a function of advertising condition and road type.
Figure 32Fixation duration for CEVMS in the day and at night.
Figure 33Fixation duration for standard billboards in the day and at night.
Figure 34Fixation duration for the road ahead in the day and at night.
Figure 35Heat map for first fixation to CEVMS with long dwell time.
Figure 36Heat map for later fixations to CEVMS with long dwell time.
Figure 37Heat map at end of fixations to CEVMS with long dwell time.

List of tables

Table 1Distribution of CEVMS by roadway classification for various cities.
Table 2Inventory of target billboards with relevant parameters.
Table 3Summary of luminance (cd/m2) and contrast (Weber ratio) measurements.
Table 4The probability of gazing at the road ahead as a function of advertising condition and road type.
Table 5Probability of gazing at ROIs for the three advertising conditions on arterials and freeways.
Table 6Level of service as a function of advertising type, road type, and time of day.
Table 7Inventory of target billboards in Richmond with relevant parameters.
Table 8Summary of luminance (cd/m2) and contrast (Weber ratio) measurements.
Table 9The probability of gazing at the road ahead as a function of advertising condition and road type.
Table 10Probability of gazing at ROIs for the three advertising conditions on arterials and freeways.
Table 11Estimated level of service as a function of advertising condition, road type, and time of day.

List of Acronyms and Symbols

CEVMS
Commercial Electronic Variable Message Sign
EB
Empirical Bayes
DCZ
Data Collection Zone
ROI
Region of Interest
LED
Light-Emitting Diode
IR
Infra-Red
CCD
Charge-Coupled Device
MAPPS
Multiple-Analysis of Psychophysical and Performance Signals
GEE
Generalized Estimating Equations
FHWA
Federal Highway Administration
DOT
Department of Transportation
Updated: 12/30/2013
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