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8/10/2019 ITS (intelligent transport system)
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Intelligent Transport
System ITS)
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What is
Intelligent Transport
System ?
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efforts to add
information & communications technology
to transport infrastructure & vehiclesto manage factors such as vehicles & routes
to improve safety & reduce vehicle wear, travel time
& fuel consumption.
Intelligent Transport System ITS)
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Intelligent Transport System ITS)
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Intelligent Transport System ITS)
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Intelligent Transport
Technologies
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Varies in technologies applied
Typical ones?
Intelligent Transport Technologies
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Wireless communications
Radio modem communication on UHF & VHF frequencies are widely used for short & long range
communication.
Longer range communications such as WiMAX,GSM, 3G are well established but require extensive
& very expensive infrastructure deployment.
Intelligent Transport Technologies
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Computational technologies
Recent advances in vehicle electronics have led to amove toward fewer, more capable computer
processors on a vehicle.
Most important of these for ITS artificial intelligence
Intelligent Transport Technologies
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Floating car data/floating cellular data
Virtually every car contains one or more mobilephones which routinely transmit their location
information to the network.
This allows them to be used as anonymous trafficprobes. As the car moves, so does the signal of the
mobile phone.
Intelligent Transport Technologies
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By measuring and analyzing network data, it is
converted into accurate traffic flow information.
With more congestion, there are more cars, more
phones, and thus, more probes.
Intelligent Transport Technologies
No infrastructure needs to be built along the road;only the mobile phone network is leveraged.
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Floating car data technology provides great
advantages over existing methods of traffic
measurement:
much less expensive than sensors or cameras
more coverage: all locations and streets
faster to set up (no work zones) and less
maintenance
works in all weather conditions, including heavy rain
Intelligent Transport Technologies
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Sensing technologies
Technological advances in telecommunications & ITcoupled with state-of-the-art microchip, RFID, &
inexpensive intelligent beacon sensing technologies
enhanced the technical capabilities for ITS.
Sensing systems for ITS are vehicle & infrastructure
based networked systems.
Infrastructure sensors are indestructible devices
embedded on the road or buildings, posts & signs.
Intelligent Transport Technologies
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Inductive loop detection
Inductive loops can be placed in a roadbed to detectvehicles as they pass over the loop by measuring
the vehicle's magnetic field.
The simplest detectors simply count the number ofvehicles during a unit of time (typically 60 seconds)
that pass over the loop.
Intelligent Transport Technologies
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More sophisticated sensors estimate the speed,
length, weight of vehicles, distance between them.
Loops can be placed in a single lane or across
multiple lanes & work with very slow or stopped
vehicles as well as vehicles moving at high-speed.
Intelligent Transport Technologies
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Video vehicle detection
Traffic flow measurement & automatic incidentdetection using video cameras is another form of
vehicle detection.
Video detection systems do not involve installingany components directly into the road surface ~
known as a "non-intrusive" method of traffic
detection.
Intelligent Transport Technologies
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Video from black-and-white or color cameras is fed
into processors that analyze the changing
characteristics of the video image as vehicles pass.
A single video detection processor can detect
traffic simultaneously from 1 to 8 cameras,
depending on the brand and model.
Intelligent Transport Technologies
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Typical output from a video detection system?
~ lane-by-lane vehicle speeds, counts,
lane occupancy readings.
Some systems provide additional outputs:
~ gap, headway, stopped-vehicle detection,
wrong-way vehicle alarms.
Intelligent Transport Technologies
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Intelligent Transport
Applications
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Electronic Toll Collection ETC)
ETC makes it possible for vehicles to drive throughtoll gates at traffic speed, reducing congestion at
toll plazas & automating toll collection.
Originally ETC systems were used to automate tollcollection, but more recent innovations have used
ETC to enforce congestion pricing through cordon
zones in city centers and ETC lanes.
Intelligent Transport Applications
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Emergency vehicle notification systems
In-vehicle eCall is an emergency call generatedeither manually by the vehicle occupants or
automatically via activation of in-vehicle sensors
after an accident.
When activated, the in-vehicle eCall device will
establish an emergency call carrying both voice &
data directly to the nearest emergency point
Intelligent Transport Applications
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The voice call enables the vehicle occupant to
communicate with the trained eCall operator.
At the same time, a minimum set of data will be sent
to the eCall operator receiving the voice call.
Minimum set of data contains information about the
incident :
time, precise location, the direction the vehicle was
traveling, and vehicle identification.
Intelligent Transport Applications
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Automatic Road Enforcement
A traffic enforcement camera system, consisting of
a camera and a vehicle-monitoring device, is used
to detect and identify vehicles disobeying a speed
limit or some other road legal requirement and
automatically ticket offenders based on the license
plate number. Traffic tickets are sent by mail.
Intelligent Transport Applications
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Applications include:
Speed cameras that identify vehicles traveling over
the legal speed limit . Many such devices use radar
to detect a vehicle's speed or electromagnetic loops
buried in each lane of the road.
Red light cameras that detect vehicles that cross a
stop line or designated stopping place while a red
traffic light is showing.
Intelligent Transport Applications
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Bus lane cameras that identify vehicles traveling in
lanes reserved for buses. In some jurisdictions, bus
lanes can also be used by taxis or vehicles engaged
in car pooling.
Level crossing cameras that identify vehicles
crossing railways at grade illegally.
Intelligent Transport Applications
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Variable Speed Limits
Recently some jurisdictions have begun
experimenting with variable speed limits which
change with road congestion and other factors.
M25 UK (1995). Initial results indicated savings in
journey times, smoother-flowing traffic, and a fall in
the number of accidents, so the implementation was
made permanent in 1997.
Intelligent Transport Applications
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Intelligent Transport Applications
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Collision Avoidance Systems
Japan has installed sensors on its highways to notify
motorists that a car is stalled ahead
Intelligent Transport Applications
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Dynamic Traffic Light Sequence
Intelligent RFID traffic control has been developed
for dynamic traffic light sequence.
It avoided the problems that usually arise with
systems using image processing and beam
interruption techniques.
Intelligent Transport Applications
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RFID technology with appropriate algorithm and
database were applied to a multi vehicle, multi lane
and multi road junction area to provide an efficient
time management scheme.
The real time operation of the system able to
emulate the judgment of a traffic policeman on duty,
by considering the number of vehicles in eachcolumn and the routing proprieties.
Intelligent Transport Applications
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