ONLINE TRAFFIC JAM MONITORING FOR MOBILE

USERSAssoc. Prof. Dr. Alexander V. Ivanov

Prof. Dr. Alexander Yu. Platov

Undergraduate Student Dmitry V. Stepanov

Nizhny Novgorod State University of Architecture and Civil Engineering,

Russia

NNSUACE

• New reality includes– Traffic congestion localities, described by average

“jam” velocity and the congestion size,

– Meteorological data including wind velocity and solar radiation,

– Calculated traffic flow parameters– Calculated air pollution (concentration of air pollutants

and noise)– Calculated short term and long term health risk.

NNSUACE Online Monitoring of Traffic Jam

Gaussian Model of Turbulent Diffusion

where:

C is the concentration of a pollutant in the air, mg/m3;

Q is the emission rate of the pollutant, mg/s

is the standard deviation of the Gaussian dispersion in the horizontal direction at x0, y0, z0; m;

is the standard deviation of the Gaussian dispersion in the vertical direction at x0, y0, z0; m;

U is the wind speed, m/s;

F is the background pollutant concentration, mg/m3.

h is the effective height of the source, m

x, y, z are the emission source coordinates, m;

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.2

,2 22

U

xK

U

xKz

zy

y == σσ

Gaussian Model of Turbulent DiffusionNNSUACE

Gaussian Model of Turbulent DiffusionNNSUACE

Atmosphere Boundary layer stability NNSUACE

Wind Velocity, m/s

Classes of sustainability A-F

Day timeSolar radiation

Night time. Clouds

Strong Convection

Moderate Convection

Slight Convection

>50% <50%

<2 A (A+B)/2 B E F

2-3 (A+B)/2 B C E F

3-5 B (B+C)/2 C D E

5-6 C (C+D)/2 D D D

>6 C D D D D

Pasquill stability categories

Online MeteoData Including Wind Velocity and Solar Radiation http://www.realmeteo.ru/

Meteorological Data is basic info for turbulent diffusion calculation

Moscow Never SleepsNNSUACE

Measured Share of Cars, Buses, Lorries and TrucksNNSUACE

Every Congestion Has Unic PortraitNNSUACE

User – Server Interaction Procedure NNSUACE

NNSUACE Online Flow Velocity http://www.yandex.ru/maps/47/

Internet address:https://yandex.ru/maps/47/nizhny-novgorod/?ll=44.005986%2C56.332609&z=11&l=map%2Ctrf%2Ctrfe&source=traffic

Interactive User-Server AlgorithmNNSUACE

Internet Service for Mobile Users Eco-routes NNSUACE

Avalable at http://eco-routes.appspot.com/

Web-Service Application Form

Start point and destination point

Start calculation

Calculated Concentration 1 of NOx

Calculated concentration 2 of Nox NNSUACE

Short Term Health Risk AssessmentNNSUACE

Short term risk assessment follows the methodology developed by A.V. Kiselyov and L.A. Savvateeva :

The 1st class of hazard: Prob = -9.15 + 11.66 * lg (С/MAC sh.t.),

The 2nd class of hazard: Prob = -5.51 + 7.49 * lg (С/ MAC sh.t.),

The 3rd class of hazard: Prob = -2.35 + 3.73 * lg (С/ MAC sh.t.),

The 4th class of hazard: Prob = -1.41 + 2.33 * lg (С/ MAC sh.t.).

Long Term Toxic Risk Assessment

Risk = 1 – exp{ln(0,84) [C/(MAC*Кз)] b t} ,

С – daily average concentration; MAC – max. allow. concentration; Кз - coefficient of safety is equal to 7,5 для 1st class of

hazard, 6 – for 2th class, 4,5 - for 3th class and 3,0 - for 4th class of hazard;

b – isoeffectiveness coefficient is equal to 2,4 for 1 class, 1,31 - for 2 class, 1,0 - for 3 class and 0,86 for 4class of hazard;

t – term of exposition; t = 1 for 70 years.

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Long Term Toxicological Health risk

• To calculate the pollution indicators, the user must click "Rate risk". As a result, the user sees ancategorized level of the Risk.

• The calculated level has Three categories

• 1. Favored2. Satisfactory3. Danger

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Conclusion 1Both short term and long term health risk estimations are important

online services for mobile users especially during traffic congestion.

Rather simple formulas are used to make instant estimation.

Traffic intensity and flow rate are the basic parameters for emission of pollutants.

Calculation of flow rate during traffic congestion is a very popular internet service provided by feveral private companies.

Several certified companies provide online meteorological services.

Key assumption for the calculations is that the measurement of the flow rate during traffic jam enables calculating traffic intensity.

The above mentioned assumptions and services give hope to spread online health risk assessment for the whole country.

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Conclusion 2

The weak point of the online monitoring is the lack of comparison with observations.

The service needs more detailed information about roads and vehicles. Number of lanes, traffic lights and age of vehicles are important for the accurate calculation.

Adaptation of the calculation for local circumstances will be a further task.

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Thank You Thank You for Your Kind Attentionfor Your Kind Attention!!

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Alexander Ivanov,Alexander Ivanov,alexanderivanov52@gmail.comalexanderivanov52@gmail.com