0_ CUPRINS - IPA SA

tests were oriented mostly to check the accuracy of the
sensors and the possibility of functioning in outdoor
conditions for the specific equipment. These outdoor tests
were carried on in Bucharest, in urban environmental
conditions (above an underground passage), employing a set
of 3 PIR sensors, and on a highway (for high vehicles’
speeds conditions in extra-urban traffic), on a bridge located
on A1 highway.
• Automatic data acquisition of information with
specific sensors mounted in the traffic controllers
(items and status to be controlled: opening of the
front door of the traffic controller cabinet, presence
and voltage of the power supply, different stages of
the traffic controller etc.);
• The integration of the management for all resources,
with emphasize to the operator’s assistance;
• Design of a versatile web portal for the information
of the authorized operators and users and with
selected information for all users of the urban road
signaling infrastructure (large public);
• Design of a traffic information subsystem for safety
monitoring (includes traffic parameters measurement
and video streaming of the locations).
Employing the special developed webpage for the traffic
safety component, an external user will be able to access
information regarding the traffic conditions in the area of
travel , or regarding road closures, incidents, weather reports
etc. The video streaming ensures direct observation of
selected locations.
Fig. 4 The physical architecture of the test system
Figure 4 presents the general physical architecture of the
test system that was employed. The PIR sensors drive
modules are used to temporarily store data streams from the
sensors and to communicate locally with the Data
Acquisition and Communication Device. Here the messages
are concatenated and transmitted centrally to the dispatching
point via the GPRS modems. The tests showed good
functionalities of the system. A very important influence in
the precision of the system has the way the sensors are
mounted, as significant errors of vehicles lengths and speeds
can occur if the height and tilting of the PIR sensors are not
correct. The measurements and tests performed in Bucharest
and environment showed appropriate results for the
necessities of the system. The errors recorded in vehicles
speeds and lengths measurements were corrected by
adjusting the positions of the sensors. Also, the components
showed a good performance in high EM environment.
IV.
CONCLUSIONS
The novelty of the adopted solution consists of several
approaches designed to improve efficiency and to add more
services in a single application.
One advantage is that the integrated platform is designed
to be scalable and configurable, according to the signaling
infrastructure equipments used. There are several specific
components, with specific or improved design, as following:
• A geo-referenced database containing information
regarding the type, location, technical and functional
specifications and information regarding the
maintenance scheduled for all types of road
signaling elements and markings;
Fig. 5 Screenshot from the GIS application SafeTraff
As a whole, the solution presented for traffic and
signaling infrastructure safety is considered an innovative
and economic approach for small and medium cities , where
the necessity for traffic information systems is important and
the authorities do not wish, or do not have the possibility of
spending big amounts of funding. With minimal investment
and a scalable architecture, the solution presented here can
satisfy the necessity of increased road safety and can
contribute to the reduction of accidents and injuries due to
road traffic, to the decrease of stress that participants to
traffic may experience when arriving at a congested
intersection where the traffic lights fail to operate.
ACKNOWLEDGMENT
The authors would like to thank all partners involved in
the projects (SC SIAT SA, CEPETET, ULB Sibiu ) for their
fruitful cooperation and results obtained.
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