The Effects of Commercial Electronic Variable Message Signs ...

Variable Ref. # Advantages Disadvantages
2.0 Driver/Vehicle
Interactions
2.1 Steering
2.1.1 Gross movements:
curves; turns
2.1.2 Fine movements: lane
keeping
2.2 Throttle
2.2.1 Pedal press; pedal
position; duration
2.2.2 Pedal release;
duration
2.3 Brake 125
2.3.1 Pedal press; duration;
excursion
Surrogate for distraction.
60 Difficult to measure.
Surrogate for distraction.
49
Less important.
Less important.
2.3.2 Pedal release Less important.
2.4 Shift (manual only)
2.4.1 Gear selection (speed) Not important.
2.4.2 Gear transitions
(shifts)
2.5 Displays 154
2.5.1 Speedometer Secondary visual distractor.
Not important.
2.5.2 Other: gauges; radio Less important.
2.6 Other controls 154, 25
2.6.1 Safety: windshield
wipers; instrument lights;
horn; turn signals
54 Less important, except turn
signals.