Project JUTS – Urban Traffic Simulation System

David Hartman

www.juts.zcu.cz

DSS 2004

Talk Overview

Short introduction Overview of the project structure Project team Main activity areas Conclusions and future works

Short introduction

Complex urban traffic simulation Programs and peoples Java, XML, swing, CAD, … Wide collaboration (Pilsen dpt.)

Overview of project structure

Concepts and design – DSS2003 Main parts – Simulation part

– Core– GUI

New programs – Data processing– Map Editor– Generator editor

Basic simulation structure

Simulation coreData GUI

What is Simulation Core?

Modified Nagel-Schreckenberg model Spatial divided cellular automata (CA)

with pseudo-agent behavior Leading Head Algorithm as modified

CA rule

2 1 1 3

space between vehicles

1 cell

speed vi < vmax

Simulation core

Simulation map structure

Simulation map Segments of map

– Roads with traffic lanes– Crossroads, roundabouts– Generators, Terminators

Connections– Accessplaces (discrete graph structure)

C

R R

R

R

R

R

G

G T

T

T

R - road C - crossroad G - generator T - terminator

G

Simulation core

What does it mean Data?

XML based simulation structure JUTS project as defined data structure

– Main project file– Static Simulation Map

Segment Structure Graphic representation

– Dynamic data Stochastic settings Simulation state

Data

What does GUI do?

Reading results of simulation and visual representation

Access to simulation structure– Reading content of different segments– Change properties

Control the simulation running

GUI

Extended project structure

Simulation coreData GUI

Map Editor

Generatorseditor

Transformationprograms

Pilsen

Data

Project Team

Project grows = more people Separeted problem parts

– Data Analysis– Map Editor– Simulation Core– GUI

Need for good communication

Team members

Pavel Herout – The Leader David Hartman – Project specification,

Core, First version of GUI, Site Martin Šour – GUI Jana Hájková – Map Editor T. Potužák & Z.Kubovec – Generator

Editor

Team communication

Simulation core

GUI

Map Editor Generatorseditor

HartmanŠour

Hájková

Herout

Kubovec & Potužák

Web Site

Versions on web site– Simulation Core– GUI– Maps

Plans and formats convention Other information

Main activity areas

Simulation core development GUI development Map editor and data works Generator creation from data Case study Cooperation with Pilsen

Simulation map

Creation of segment simulation map Loaded fully from XML data

– Static map– Dynamic data

Structure and Graphic divided Controled loading and logging

Simulation running

Connection of the segments into map Implementation of Leading Head

Algorithm Moving vehicles through the segment

structure Still bugging

Simulation features

Implementation of the basic simulation characteristics collecting

Including the path determination Enable cooperation with GUI Enable to run with offline output …

First version of GUI

Swing Multilanguage enviroment GUI window structure Configuration file in XML

First version of GUI

Enable loading projects– Using specific project structure– Offline and online

Manage the loading– Loading threads– Connecting GUI with simulation– Logging process

First version of GUI

Simulation running– Creation of active running parser– Enable jumping

Manage the simulation map– Editing traffic lane content– Editing content of crossroad– Editing generator properties– Editing vehicle properties

GUI extensions

Extension of configuration file New structure according to core and

data analysis developlment Map painting Performance improvement

Original map painting

Map structure in image Views at scrollpanel

only parts of the image Main disadvantage is

memory requirements

Map graphical rendering

Each simulation segment has its painter– Draw the segment (e.g. road)– Draw the parts of segment (e.g. traffic lane)– Draw vehicles in segments

Drawing Decision – Each part of segment– The whole map is not needed– Better for memory requirements

Map segment rendering

Painters test presents in area of view– Test itself– Test its parts

Performance and memory improvement

Testing follows

Memory Tests

Map Size Image Rendering

1663 x 1775 11 530 KB 47 KB

3326 x 3550 46 122 KB 47 KB

4989 x 5325 103 775 KB 47 KB

6652 x 7100 184 489 KB 47 KB

Performance tests

Map SizeIcon repaint

Graphical Rendering

Segment Rendering

25 x 27 0,02 4,0 4,0

103 x 110 0,02 5,4 5,4

207 x 221 0,02 8,0 8,2

415 x 443 0,02 13,2 13,4

831 x887 0,02 9,3 8,1

3326 x 3550 0,02 3,5 1,7

4989 x 5325 0,7 3,5 1,7

6652 x 7100 Exception 3,5 1,7

GUI final

Map editor and data analysis

Design of map editor– Design of GUI– Data parsers

Working with data – creating standards with Pilsen city departement

Working on Lochotin district– Case study

Generator editor

Processing traffic detectors data for specific traffic lanes– Transformation to XML structure– Cooperation with the JUTS standards

GUI for simulation map editor creation– Graphical setting of generator properties– Easy segment creation

Visualization of detector data

Changes with emulation

Case study – Lochotin district

All data available – CAD road graph– Detectors data– Traffic lights data

Static structure of the map– Already created– Testing and adapting

Cooperation with Pilsen

Available data– Static CAD Data– Detectors data– Traffic ligths data

Standardization efforts– Connect city data through the juts id– Convert data to more standard format

Cooperation with Pilsen

DAT Std.description in XML

Excel

XML

Generator Editor

Map Editor

JUTS simulation

system

Data standards

Segment data standards– Definition of ID– Definition of connections

Generator data standard– Time organized XML structure for specific

detector (i.e. traffic lane)

Conclusions

Division of project still in progress, communication needed

Project parts separation speed-up project development

Good cooperation with Pilsen Data standardization

Future work

Lochotin district simulation and simulator verification

Characteristic visualization Map structure and generator data

standardization Other features and performance