Traffic congestion improving the traffic flow

Both sensors are usually attached to existing infrastructure such as light or sign poles, and data backhauled via a wireless modem to our cloud-based servers. The data is streamed to our customers via a secure, private XML link. Our customers use SpeedInfo data for highway operations, reducing traffic congestion, and empowering drivers with real-time traffic information.

Traffic congestion improving the traffic flow

Get Full Essay Get access to this section to get all help you need with your essay and educational issues. Get Access Traffic Congestion: Improving the Traffic Flow Essay Sample Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing.

The most common example is the physical use of roads by vehicles.

Traffic authorisations - Department for Transport

When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, this results in some congestion. As demand approaches the capacity of a road or of the intersections along the roadextreme traffic congestion sets in.

When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam or traffic snarl-up.

Causes Traffic congestion occurs when a volume of traffic or modal split generates demand for space greater than the available road capacity; this point is commonly termed saturation.

There are a number of specific circumstances which cause or aggravate congestion; most of them reduce the capacity of a road at a given point or over a certain length, or increase the number of vehicles required for a given volume of people or goods.

About half of U.

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It has been found that individual incidents such as accidents or even a single car braking heavily in a previously smooth flow may cause ripple effects a cascading failure which then spread out and create a sustained traffic jam when, otherwise, normal flow might have continued for some time longer.

Traffic scientists liken such a situation to the sudden freezing of supercooled fluid. Because of the poor correlation of theoretical models to actual observed traffic flows, transportation planners and highway engineers attempt to forecast traffic flow using empirical models.

These models are then typically calibrated by measuring actual traffic flows on the links in the network, and the baseline flows are adjusted accordingly.

That discovery enabled the team to solve traffic-jam equations that were first theorized in the s. Shown here is a traffic jam in Delhi.

Shown here is a traffic jam at Congested roads can be seen as an example of the tragedy of the commons.

Traffic congestion improving the traffic flow

Because roads in most places are free at the point of usage, there is little financial incentive for drivers not to over-use them, up to the point where traffic collapses into a jam, when demand becomes limited by opportunity cost.

Privatization of highways and road pricing have both been proposed as measures that may reduce congestion through economic incentives and disincentives.

Traffic flow - Wikipedia

Economist Anthony Downs argues that rush hour traffic congestion is inevitable because of the benefits of having a relatively standard work day. In a capitalist economy, goods can be allocated either by pricing ability to pay or by queueing first-come first-serve ; congestion is an example of the latter.

Highway Performance and Monitoring System forandas well as information on population, employment, geography, transit, and political factors.

They determined that the number of vehicle-kilometers traveled VKT increases in direct proportion to the available lane-kilometers of roadways. The implication is that building new roads and widening existing ones only results in additional traffic that continues to rise until peak congestion returns to the previous level.

These levels are used by transportation engineers as a shorthand and to describe traffic levels to the lay public. While this system generally uses delay as the basis for its measurements, the particular measurements and statistical methods vary depending on the facility being described.

For instance, while the percent time spent following a slower-moving vehicle figures into the LOS for a rural two-lane road, the LOS at an urban intersection incorporates such measurements as the number of drivers forced to wait through more than one signal cycle.

Therefore, another classification schema of traffic congestion is associated with some common spatiotemporal features of traffic congestion found in measured traffic data. Common spatiotemporal empirical features of traffic congestion are those features, which are qualitatively the same for different highways in different countries measured during years of traffic observations.


Common features of traffic congestion are independent on weather, road conditions and road infrastructure, vehicular technology, driver characteristics, day time, etc. Negative impacts Traffic congestion detector in Germany. Traffic congestion has a number of negative effects: As a non-productive activity for most people, congestion reduces regional economic health.

Countermeasures It has been suggested by some commentators[who? This avoids concentration of traffic on a small number of arterial roads and allows more trips to be made without a car.

Traffic management Use of so-called Intelligent transportation system, which guide traffic: In some countries signs are placed on highways to raise awareness, while others have introduced legislation against inconsiderate driving.

This often includes accidents, with traffic slowing down even on roadsides physically separated from the crash location. With lower speeds allowing cars to drive closer together, this increases the capacity of a road.

Note that this measure is only effective if the interval between cars is reduced, not the distance itself. Low intervals are generally only safe at low speeds.Traffic congestion is a condition on transport networks that occurs as use increases, and is characterised by slower speeds, longer trip times, and increased vehicular traffic demand is great enough that the interaction between vehicles slows the speed of .

In , ten years after its implementation in , TfL reported that the congestion charging scheme resulted in a 10% reduction in traffic volumes from baseline conditions, and an overall reduction of 11% in vehicle kilometres in London between and Quality of Service (QoS) refers to the capability of a network to provide better service to selected network traffic over various technologies, including Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet and networks, SONET, and IP-routed networks that may use .

Results reveal how low speed limits affect traffic performance. • The lower the speed limit, the higher the occupancy to achieve a given flow. Aug 31,  · The way we can make traffic disappear. Discuss this video: Brought to you in part by: Special Thanks to: Mark.

Description of Congestion Control Mechanisms from Tom Sheldon's Encyclopedia of Networking and Telecommunications.

Traffic congestion - Wikipedia