  This paper analyzes the impact of providing car drivers with predictive
information on traffic signal timing in real-time, including time-to-green and
green-wave speed recommendations. Over a period of six months, the behavior of
these 121 drivers in everyday urban driving was analyzed with and without
access to live traffic signal information. In a first period, drivers had the
information providing service disabled in order to establish a baseline
behavior; after that initial phase, the service was activated. In both cases,
data from smartphone and vehicle sensors was collected, including speed,
acceleration, fuel rate, acceleration and brake pedal positions. We estimated
the changes in the driving behavior which result from drivers' receiving the
traffic signal timing information by carefully comparing distributions of
acceleration/deceleration patterns through statistical analysis. Our analysis
demonstrates that there is a positive effect of providing traffic signal
information timing to the drivers.
