Traffic Control - Science topic

In 21st century Artificial Intelligence and IoT based traffic systems are being researched across the world. But implementation rate and the economical efficiency are yet to focus on.

I want to know if there's any algorithm or standardised system confirmed for future research to deploy a universal traffic management system. Human intervention in traffic system and algorithm based traffic controlling should be alined for further development to ease current traffic issues.

The boundaries of my investigations limits by real implementation on cities which are too far from driverless cars, ITS or other hyperllops-like decisions. I carefully examined,perhaps, all the existed models and approaches from japanees "Jamology", limitations of transport flows in the centre (of London,tax model), VANET, platooning, V2X, SCATS, SCOOT, traffic lights management and other methods which have some limitations from 'non detected' [without any sensors] vehicles (old cars, mini bus taxies or so-called "root taxy" , horses and carts , motocyclies, scooters, etc. or the bypass roads (which have exits in the centre of calculating zone and make some deviations in algorithms).

Not everything is solved by the development of public transport. In our city, it is planned to build a subway for 20 years, but the zones of the city are developed according to their own laws without taking into account the plans laid down for the metro, and therefore part of the dug canals under the ground do not meet today's needs.

Similarly, with the development of cycling and pedestrian zones. In countries with sharply continental weather in the cold season, it is unlikely that the city dweller will choose a bicycle instead of his personal car while the temperatures below 20 °C. Bus routes can have a certain effect, but again, dedicated lanes are needed (consider adjustments to the law and traffic regulations) and the replacement of a fleet for more comfortable trips as well as more developed routes. Inspection of road regulation(the police) is not as much interested in solving the problems of traffic congestion. The main indicator of the success of their work is the minimum number of accidents and victims on the roads. Therefore, the lower the traffic flow rate or its "standing", the calmer. Thus, what solution can really be implemented in cities where there are no autonomous and flying cars, where the budget is not enough to build monorails and tunnel stations (junctions) to connect metro, buses and other vehicles in rooms with comfortable conditions (for example, Queensland , New Zealand)?

the traffic light sometimes is easier to cause the traffic jam problem, if the designer don't make to many change to the both side of the road,such as the house and block building, what other aspect of things can be done to mitigate the traffic jam problem.

Intelligent Transportation Systems(ITS) are widely used in the world for traffic management. However, there are still many questions about the effective use of these systems. For example, are intelligent transportation systems used efficiently enough? Do different intelligent transportation systems have the ability to interact with each other? Is proactive control possible with traffic control centers? Can Artificial Intelligence be used for proactive work? Can the performance of the system or center be increased with artificial intelligence? I am curious about your ideas and/or experience on this subject.

hi everyone, I have developed a simulation of a roundabout with a fixed time regulation, the lines of traffic lights in the roundabout are for vehicle storage. my question is: when we regulate by tricolor light signals, should we make all the conflict zones inactive? and is it normal that we will have vehicles crossing each other? any help will be appreciated, thanks in advance

How Carpooling will reduce Traffic Congestion? I am researching on this in Islamabad.

What will be methodology to find out facts & figure?

Can any one suggest best software or Survey link which would be helpful.

I want to do publication on this topic.

I have a link with multiple lanes; I want to calculate queue length on each lane at every timestep of a simulation run. I have explored the following options:

1) Makeshift method: creating separate links corresponding to each lane and define vehicle inputs separately. Insert the queue counter on each link. However, it would restrict lane change behavior.

2) Queue counter: It gives the maximum of queue length on individual lanes. I can apply a factor based on the vehicle turning ratio to estimate queue length on each lane.

3) Data collection points: Applying two such points on separate locations on each lane and processing the data from it. But, if vehicles changed lanes in between the two points, then it wouldn't give exact queue length

4) Node evaluation: Not sure how to implement it for each lane. I also suspect it will create an issue the same as the third point.

Let me know if you need any further clarification.

Any suggestions would be much appreciated! Thank you for your time.

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Intelligent transportation systems provide many advantages as part of our daily lives. One of the most common applications of these current and increasingly widespread systems in our cities is intelligent junction control. The scope of the intelligent junction control concept which includes different approaches and algorithms, is quite wide. It is known that it needs realistic and objective technical knowledge to guide decision makers correctly. In this sense, what do you think the definition of intelligent intersection should include? Is a high-cost intersection control system with a lot of equipment always necessary? Or are the lower cost solutions that enable multi-plan control by only increasing the number of control programs? What should be the threshold or the transition point for the preference? Is it sufficient to make only cost-benefit analysis? To what extent should social benefits be taken into account for feasibility analysis? Sharing your views on this issue can be beneficial to many researchers and interested parties and can contribute to the spread of sustainable transportation (traffic management) systems.

I am conducting a study on connected vehicles and intelligent multimodal lane management and I was wondering if RM could be used with connected vehicles and how? (during the deployment period and after a hypothetical full deployment)

Also I recently read about the 2009 Path IRMP and was wondering if it was possible to download it.

Thank you a lot for your kind help.

I am looking for suitable software (paid or free) that can be used for optimizing traffic light cycles at an intersection.

I need to find a tool for road traffic modeling which permits the implemention and testing of any type of algorithms for traffic flow prediction, especially neural networks or fuzzy based algorithms. It will be helpful if that tool provides a graphical view of car movement and crossroads configuration.

I want to calculate traffic density of roadways near intersections and also midblock sections on urban roads. I have video recordings for different locations. So, I want to know about any reliable methods to calculate road density from the videos.

Now I am thinking about the idea of optimizing the traffic flow of cars in the urban road-street network, controlled by autopilot.

I heard that in Hanzhou (and not only), the City Brain 2.0 traffic control system developed by Alibaba was used. Where to find a link to an article describing this system?

I am looking for guidance, white papers and scholarly articles about road diets on an arterial street with an annual average daily traffic (AADT) above 45,000 and a peak hour volumes of 4,000 and greater.

Hi, I am working on the simulations of Aw and Rascle second order model for traffic flow, the model does not produce stable results, Why is that so ?

The numerical scheme is stable, i have checked the scheme for other models, it is quite good.

I wanted to know the advantages of data mining techniques are, when compared with macroscopic traffic flow models, microscopic models, simulation models for transportation traffic congestion prediction? Which one has a higher performance data mining techniques like decision tree, SVM or simulation approaches or simple travel time and speed prediction approaches?

We all know for a control system, the quality of information (e.g. state info, context info) could have significant impacts on control performance like stability and convergence rate, etc. To theoretically explore such impacts, it is important to adopt suitable system model and corresponding theory. for example, multi-agent system and theory to model coordination control problems and analyze the impact of information flow. In context of cloud computing and IoT more information could be available for a typical control system like traffic control, I just wonder what popular theory framework can apply to such applications? Is there any related surveys to read? thanks a lot.

Hey ,

I'm a PhD student, I work on modelization and urban traffic control.

I try to work with, Vissim but it's impossible to save project with ( for trial licence). Can you help me please? I was thankful.

I want to analyze bicyclist-motor vehicle crashes at intersections with 3 different types of traffic controls using a mixed logit or spatial mixed logit model

Roundabouts are one of the efficient method in traffic control. However, because of many reasons we need to refer traffic signal application. I want to make a discussion about this issue with my colleaques to reveal these reasons and also to enlight young reseachers and engineers.

I am looking forward to your comments.

From recent study it seems that 61% of people see artificial intelligence making the world a better place.

The biggest benefits are seen in advances in healthcare, science and traffic control and pollution forecasting.

#study #World #people #artificial #intelligence #benefits #science #traffic #forecasting

I'm researching driver behaviour on the approach to signals and need more data on how drivers react and adjust their speed under the following conditions:

1)  lead platoon with red signal - no queue at stopline

2) lead platoon with green signal - queue visible and discharging

3) lead platoon with green signal, anticipating onset of red before stop line is reached

I am interested in the variability in reaction time, point of reaction, deceleration rates over 3 stages- @foot off, @brake applied, and @coasting to final stop

TIA comes with the legal background. Therefore it has been allowed normalize traffic level for all. But there are significant road segments that cannot allow the legal level.

If there any article journals related this please let me know. I like to make a framework for my study. therefore I need the base that other localities use.

Thank you,

Dilshan

I want to calculate the lateral shifting / lane changing behaviour of vehicle in a traffic stream. I want to know about some methods by which practically this distance can be calculated on road?

I have found quite a few studies on this topic that have been conducted in developed countries. [viz (Sutermeister, 1956), Pretty (1973), May and Montgomery (1988), Mahalel, Gur and Shiftan (1991), Ye, Veneziano and Lassacher (2008) etc]. As manual traffic control is only used for emergencies and special occasions in developed countries, not many studies are done compared to other hot topics. But in Asian countries, manual traffic control is quite common, but, I could not find any studies related to this topic. Can anyone suggest me a few if its available?

Hi,

i implemented GA in order to minimize the summation of total delay through each lane in a single intersection with a fixed Cycle Length.

I wanted to ask you, if there is a way to estimate a good Cycle Length according to queue length for each road before trying minimization of total delay. As you know cycle length affects the total delay..

Thank you all

Puffin signal crossings are based on sensors for pedestrian detection. What are the different type of senors/image processing tools which can be used to detect pedestrians at a crossing location for installing a low cost puffin signal?

In my point of view the simulation of autonomous vehicle needs to consider the interaction between the vehicles and associated infrastructures. Hence, I wonder what types of communication(interactions) in your project is going to be study through an agent based modeling.

There are so many methods in estimating car traffic volume.However, methods about estimating bicycle traffic flow are very few.So I want to know some methods can estimate bicycle traffic volume.

Longitudinal seal repairs sometimes tend to cause severe instability in motorcycles under dry conditions in corners.  Anecdotally it does not appear to be strongly correlated to road temperature, although on days with higher than normal surface temperatures it does soften causing the front to slide.  I am looking for cases where this was identified as a cause and low-cost solutions to improve the traction of these seal repairs

My hypothesis is that surface ripples cause the following problems and could be an underlying cause of many run-off-road crashes in rural areas:

- in the braking zone the suspension could pack down due to a lack of compression damping causing longer braking distances and hence higher entry speed

- a rider's arms could stiffen up due to excessive forces feeding through the suspension delaying the turn-in point and also slowing the rate of turn-in,

- at the apex the bike is easily destabilised that may cause a mid turn adjustment causing a wider exit radius to be followed,

- on the exit it could cause instability under acceleration causing the rear to lose traction.

I am looking for evidence where surface ripples are correlated to loss of control crashes, and whether this affects all types of motorcycle crashes, or mostly those types that have relatively poor handling attributes (i.e. Cruiser vs. Sportbike designs)

Is it viable to calculate the pollution only near bus terminals and across the red light crossings and on the basis of that predict the pollution of the whole city?

We are conducting the safety analysis at several uncontrolled intersections where no traffic control devices are present. We want to compare Post Encroachment Time (PET) and critical gap time for the safe stop. For those who are not familiar with the term PET, here is the definition:

The time between the first road user leaving the common spatial zone (in a two road user encounter) and the second road user arriving at it.

It is possible to determine the PET manually from the recorded video. But, my question is how to come up with the critical gap required for a safe stop based on running speed.

Thanks in advance.

Hi,

I am working on optimization approaches on an intersection. And I have been getting some questionnable results on the simulator. I get some high troughputs of vehicle in the intersection but with big average delay of vehicles e.g : 

In a scenario I get a throughput of 4544 with an average delay of 31.22 seconds and average queue length per phase of 41 meters

And in another scenario I get a 4551 throughput with an average delay of 31.26 seconds with an average queue length per phase of 39.68 meters

This compared to the average study of the same intersection we see different results, e.g  in a scenario a throughput of 4343 with an average delay of 30.7 seconds and an average queue length per phase of 21.1 meters.

I am starting to question my results performance. Doesn't higher throughput mean minimum average delay and lesser queues on lanes ?

Hi There,

Is there a method or standard to estimate the daily traffic distribution from the peak AM and PM?

Thanks

Is creating of new attractions next to the highly visited protected area increasing or decreasing the intensity of tourist traffic in this area? Or maybe there is no influence at all?

Does anybody know the good example that can illustrate this phenomenon?

We are planning to design a road traffic controller which will detect the road traffic intensity and according to that green light's on time will be determined.

Besides, we will design rail gate controller which will automatically detect the arrival/departure of train and close/open the rail gate.

What sensors are suitable for these purposes?

I want to build a system for managing traffic lights.

Genetic Algorithms will optimize green times according to recent congestion and road priority.

I had already a touch with GA by implementing 0-1 knapsack problem,

but in this case i really dont know how to implement this in order to output optimized timings for a intersection (4 roads / 4 lights)

I would appreciate any help as a roadmap.

Thank you. 

I have been working with research on new predictive model of train traffic by using new railway signaling systems. I would appreciate if anyone could introduce me any work about European Raiway train management system (ERTMS), especially about safe movement of train, calculation methods of trains regulation, considering intervals between trains.

there are many works related to determining the accidents, while we want to estimate the time and location of possible accident. I would appreciate if anyone could introduce me any work in this regard.

How many times can I change signal timing plan at isolated intersections during the day?

Hello,

I am trying to do a study on time headway on an urban road that is preceded with a signalized intersection. After gathering the necessary data, I had to do a sampling process to eliminate the trending and periodicity on the data.

I had to eventually divide the data on 2 distinct categories, which are the phases of the preceeding signalized intersection (the intersection has 2 phases with different durations).

Now I am finding myself with two different patterns. in order to study the Time Headway on different trafic levels. I need to define different increments (number of vehicle arriving in a period). Since I have two categories I would have different resulting hour volumes.

Let me give you an example, Phase 1 has a 36s duration and phase 2 has a 29s duration. So for example If I define an increment of 5-9 vehicles per period for the two categories, I would have a 500-900 veh\h for the samples of phase 1 and 620-1117veh\h for the samples of phase 2.

So I am not sure about this. Do I need to define different intervals for each category ? Did I go to far on dividing the data on two categories ? 

Any suggestions are welcome.

P.S : I am not a traffic engineer so I am not familiar with the procedures of time headway study. I am just trying to follow what my fellow researchers did in their papers

Thank you !

Hi researchers, by programming an algorithm (FW) for TAP by respecting the standard model of Beckman (1956), I find in the results (equilibrium) some links with a greater flow than capacity and that is not valid in practice.

My question is:

Is this is normal (because the algorithm gives an approximate solution) or we must add the capacity constraint (Capacity Constrained Side) to have a more real and practical solution.

Thank you.

Traffic Signals and Intersections control.

Hi! My work is about the traffic distribution, but i need the output of a traffic assignment (Wardrop Equilibrium); can you advice me on any free software ? Thanks

I want to study the deceleration and acceleration behaviour of vehicles in a traffic stream. Practically both are non-uniform. Regarding acceleration, we have non-uniform acceleration theory but regarding deceleration, I am not able to find any literature regarding non-uniform deceleration. So, if anybody has any idea or knowledge regarding study of non-uniform deceleration, please help. Thanks in advance

I have students having difficulty in their studies regarding small town traffic. I have recommended them a software-based analysis for them to have a more extensive simulation of different cases. They are also avoiding to procure software licenses and have asked me if i know of a free software capable of the said analysis. Anyone who can help me help my students?

Does anyone have any material or information on the subject "Railway transport flow distribution forecast in case of sudden change of the traffic situation"? I am interested particulary in the development of the module itself.

Hi, Any one can gives me idea about detecting vehicles in a captured photo. is there any application? 

how to do with IMAGE PROCESSING??

Pedestrian traffic island (also they named as pedestrian refuges) is one of the most effective and inexpensive ways to reduce the accident rate. Has anyone done research on the impact of the proportion of pedestrian crossings with islands on accident rates? 

Also would be interesting the publications about the variations of the embodiment of  traffic island, conditions and rules of their application and so on.

Aghabayk et. al (2015) explained that 'T' is the driver's reaction time in GHR model (page 86). While in the article 'Traffic Dynamics. Studies in Car Following', Chandler et. al. (1958) stated that on page 181: 

Which one is it, only the driver reaction time or perception+reaction+vehicle response? 

Both articles are linked.

Towards Scalable traffic management in cloud data centers is my base paper. As part of my project i need to implement and show the results. But I am not well aware of the implementation tools and aspects. plz update me with your knowledge...Thanks

Currently, I am working about traffic model in Bangkok, Thailand. I would like to review different models and their policy in other countries. Please kindly give me a url or publications. 

Hi there;

i want to know if there are any obvious factors, except those in MUTCD,for deciding whether or not to install a traffic signal at intersections.

or specially, where and how did the numbers and tables in MUTCD, in it's 8 warrants, come from?

thanks everybody

What are the free software on based GIS-technologies for the simulation regularities of traffic flows in the city? What are the free software for the optimization of traffic lights and other technical means of traffic control? What are the specific mathematical and information models to simulate scenarios for transport development in the city? What are the special technologies and algorithms for processing data traffic? As can be statistically modeled traffic flows if there is no data from surveillance cameras for traffic flow?

I am looking for information about plant DNA barcode as tool for identification of illegal traffic of endangered species. Thank you very much in advance.

I am presently pursuing my PhD in computer science. I have chosen the topic of my work to be an SDN based approach for data center traffic engineering. I have thought of a new topology for DCs and am thinking of comparing the performances with the existing fat tree topology, as I think other topologies like hyperX, hyperCube etc. won't work well in all the cases. I took the SDN course by Dr. Feamster. I need to know the parameters of a DC topology that really matters for comparison. Can I get the actual map of the scalability by creating topologies in mininet. How can I proceed in this?

I am failing to get the exact formula to estimate the distance between a moving vehicle and APs ahead, in an environment, where a 3G macroc-ell is overlaying a number of small cells networks such as WI-Fi cells.  

attached is the diagram explaining clearly what I am requesting help for.

I have a dataset of optimal vectors (G1,G2,G3,C) from a massive amount of simulation based optimizations that I want to use for linear regression for obtaining four formulas. Are there techniques to do a regression analysis of a system of equations properly, or can I use a heuristic solver (for instance genetic algorithm) for optimizing the linear coefficients (a1-a4 and b1-b4) while minimizing the SSE (Sum of Squared Errors)? A simplified formulation of the formulas:

Optimal vector (G1,G2,G3,C)

G1 = a1 * detector location + b1 * traffic demand

G2 = a2 * detector location  + b2 * traffic demand

G3 = a3 * detector location  + b3 * traffic demand

C =  a4 * detector location  + b4 * traffic demand

In this article, they suggest it as an option for linear regression. But I wonder if it is 'statistically' best method to use for a system of equations where you have to regress simultaneously. http://academic.pgcc.edu/~ssinex/excelets/Solver.pdf

What are your experiences in use and research of Bluetooth devices (cellular phones, on-board units and stationary installations) as measurement or monitoring of traffic? Is it really useful for traffic monitoring or traffic measure? Is it really useful for transportation modelling?

This formula is used to specify whether their is a need to provide pedestrian crossing facility or not. Its value is taken as 10 E+8 for undivided road and 2x10E+8 for divided road.

Why is it doubled in the case of divided road?

Who can give me some practical advice/examples on how to implement a Hidden Markov Model.  I would like to use that in the traffic engineering context under various traffic flow conditions. E.g.  on the approach to a queue, does driver maintain or slow down when he sights a queue or red light?  From the literature I have one thing that seems to elude me is how to calculate or estimate the transition probability matrix.

For national (or regional) road safety evaluations and comparison we have been using two safety performance indicators (SPIs):

- direct (crashes, fatalities, injuries...)

- indirect (speed, speeding, seat belt use, daytime running lights use, cell phone use...)

Now I am trying to find some correlations between them. And I ask, for example: Should percent of speeding correlate with crash counts? or with fatalities? or injuries?

All is done on the level of country (or regions) - so direct SPIs are from national/regional statistics. Indirect SPIs are from surveys, typically 7 locations per region, once per year.

And lots of other questions, for example: when surveys are done in weekdays, spring/autumn, dry weather, should crashes to correlation also come only from the same conditions? (or possibly even only in the days/hours of survey?)

I will welcome any ideas on how to do these analyses, references, etc. Thank you in advance.

What is the suitable ITS plan for traffic problems in developing countries with dense traffic jams and absence of traffic control plans. In such cases, is the environmental dimension considered in planning a new ITS system for developing countries societies? Or, just to focus on the operational performance of the street network.

It would be important for me to get information about any case where data from ITS (Traffic control systems, information systems etc.) were used to develop VDF.

I would like to extract data from  traffic control system, analyse the data and channel information to a distributed network system further usage

I know this is a long shot and it's something difficult to research let alone find on the internet, but if you have any references about this subject I'd be grateful. It's more from a standpoint of traffic psychology. Example:

There are 2 routes and both have similar features as well as distance to the final destination. One of the routes is more important and thus is used heavily by buses. If drivers knew that fact, at what percentage or would they at all (but it has to be proven) choose the other route?

I will use the simulation to test the effect of different user interface features, such as different visualizations of prognosis information, on the operators’ situation awareness.  Which software packages can I use to efficiently and effectively build a simulation environment which represents the control room? The interface will contain a geographic information system (GIS) with information layers, including vessel position tracks and different information windows with detailed information about vessels, traffic management measures, hydro and meteorological information, etc.

Hello, prompt, where you can see the data on accidents involving drivers with driving experience of 1 year in different countries?

I'm looking for the mathematical formulation of Wiedemann 99 car-following model, but I can only find a formula and not the algorithm or its way of working.

Can you suggest the articles where I can find this?

I want to simulate the intersection with intelligent traffic lights. I select SUMO for the purpose. But, still confused whether I need more software to visualize the results properly or not.Please suggest and guide accordingly.

Thanks in advance.

What is the most appropriate method / model / software for estimating the capacity and level of service for roundabouts; single and multi- entry and circulating lanes?

I am doing a research about Traffic management in historical centers and I am looking for some references  and case studies 

As many studies indicate that increasing rapidly road traffic vehicles without effective management have caused various trouble for human and environment. I am very excitited in looking up information relating to this topic : how does road traffic noise affect on human behaviour and health and what can be solutions to solve this problem?

Kind Regards 

As all of us know that data is a very important while dealing with traffic engineering

 What is the innovations in traffic data collection and analysis?