real time traffic information

02.05.2023

Real-Time Traffic Information

Furtwangen University 2016

Presented by: Tran Thi Bao Thuy

Overview

02.05.2023Furtwangen University 2016

VTL

RTTIS (Real Time Traffic Information System) collects real-time traffic situation data, performs timely analyses on the data and disseminates traffic information to the public regarding road closure, traffic flow and weather condition that affect roadways or road conditions

Traffic Sensor Type: Loop detector, RFID, Wireless, Virtual Trip Line, Sparsely-sampled GPS, High-frequency GPS

Real-Time Traffic Model


Regresstion Model using VTL-based system1

Graph Model of the Road Network

an algorithm to represent the entities which are

connections of intersections and road, for instance travel time for car

routing, distance for direction or a combination

of time and energy-consumption for vehicles.

STARMASpace-time modeling for

traffic.Traffic flow data are collected at

specific locations at constant interval

of time by loop detectors.

Level of Service (LoS)

a quantitative indicator measured the quality of traffic

service to analyse the roadways by

classifying the traffic flows and evaluating the quality of traffic based on speed,

density, etc.



Bayesian Real-Time Model with Historical Model2Historical Model are run by iterating between travel time

allocation and parameter estimation. This model calculates

the average travel time and the standard

deviation of travel time in a specified historical

period at each network’s link

.

Bayesian Networksan algorithm to

estimate and show how to allocate travel

time data to the different links travelled between observations.

Sparsely-sampled GPS is used as the

main traffic sensor in this model.

update traffic for short horizons in real steppredict traffic for long

horizons



Probabilistic Graphical Model3

Probabilistic Graphical Modeluses both particle

filtering and the EM algorithm to solve the

following paradox between State

Estimation and Travel Time Allocation



Probabilistic Graphical Model3Experiment on 500 taxis in San Francisco from 2009 to 2010

The colours show the estimated travel time

02.05.2023

Applications for Real-Time Traffic Information

Furtwangen University 2013

Mobile Millennium1

Mobile Millennium• Launched in Nov.,

2008 in North California.

• The first region-wide consumer traffic application for smart phone users and uses the privacy-preservation of virtual trip lines (VTL).

Traffic Sensor Type The feeds include data obtained from:• GPS-enabled mobile

phones• All of San Francisco's

taxis (through GPS)• Radar• Loop detectors• Historical databases.

The models and algorithms modules • Regression models with

VTL-based system• Historic Models with

Bayesian Model in real-time,

• Probabilistic Graphical Module



Mobile Millennium1



Acyclica Analyzer2

Acyclica Analyzer[1] is an analytical solution which a real-time tool for analysing data on many information traffic systems which match license plate recognition and other Bluetooth scanning technologies.

[1] https://acyclica.com/applications/real-time-traffic-services

Mobile MillenniumAcyclica Analyzer is an analytical solution which a real-time tool for analysing data on many information traffic systems which match license plate recognition and other Bluetooth scanning technologies.

Congestion Mapping Management

Travel Times and Delay



WAZE3

Acyclica Analyzer[1] is an analytical solution which a real-time tool for analysing data on many information traffic systems which match license plate recognition and other Bluetooth scanning technologies.

[1] https://acyclica.com/applications/real-time-traffic-services

WAZE• a free GPS, Mapping,

Traffic and Gas application, using real-time traffic information of drivers nearby.

• the world’s largest community-based traffic and navigation apps and also become an active community of online map editors



HERE Real Time Traffic4HERE Real Time TrafficA global leader in the mapping and location intelligence with high-definition (HD) maps to enable rich, real-time location experiences in a broad range of connected.HERE Auto offers smart guidance with accurate maps and personal services in an interactive way for end-users. Currently, many automotive companies, such as Huyndai, Toyota, Volvo, BMW etc.

Video: ARITI_BMW ConnectedDrive

http://www.bmw.com/_common/shared/insights/technology/connected_drive_2013/services_apps/rtti/video/BMW_CDrtti_EN.mp4

Furtwangen University

Thank you very much for your attention!


real time traffic information

Automotive