Change search
ReferencesLink to record
Permanent link

Direct link
Simulerad trafik till VTI:s körsimulator: en förstudie
Swedish National Road and Transport Research Institute.
2003 (Swedish)Report (Other academic)
Abstract [sv]

A driving simulator is an advanced piece of equipment used to create

realistic driver sensations in a laboratory environment. The the Swedish

National Road and Transport Research Institute, (VTI) driving simulator has

an advanced motion system. Today the VTI driving simulator does not include

any model that generates and simulates ambient traffic. The aim of this

master thesis was to construct a model that generates and simulates vehicles

for the VTI driving simulator. In order to achieve this, a survey of other

similar models around the world was performed. We found that there are at

least ten similar models. Our model is valid for a straight, dry and plane

motorway without any entering and exiting lanes. The model is named

Intelligent Traffic Generator, INTRAG. There are five different areas of

three types in INTRAG. The three types are: simulated area, candidate area

and generation area. The area closest to the driving simulator is the

simulated area. In this area the vehicles are simulated according to models

for driving behavior. The models that we have used for car-following, lane

changing and acceleration are based on the model Traffic Performance on Major

Arterials, TPMA, and the VTI Traffic Simulation Model. INTRAG also includes

models for deceleration, transformation of basic desired speed and

communication between vehicles with turn and brake signals. The areas on both

sides of the simulated area are the candidate areas. These areas are buffer

zones of vehicles. The vehicles in these areas are seldom updated. When

updated, this is not done according to any models for driving behavior. There

are two generation areas in INTRAG, one at the end of each candidate area. In

these areas, new vehicles are generated. Vehicles that have traveled out of

the model are removed in this area. The thesis also includes the task to

construct a communication link between INTRAG and the driving simulator. We

have chosen to use the Internet protocol IP and the transport protocol UDP.

The packages that are sent between INTRAG and the driving simulator are built

according to a structure that we have developed. INTRAG has been implemented

in the programming environment Borland Delphi 5. An application that can be

used as a substitute for a real driving simulator was created to test INTRAG.

The substitute has also been used during the model verification and

validation. We found, during the model verification, that the flow in average

is 3.6 to 9.9 % too low. The reason is probably non-valid measurement

methods. Besides this, the model seems to be implemented correctly. INTRAG

has not yet been tested within the VTI driving simulator. The tests that have

been done with the substitute provide an indication that the model may be a

good representation of the reality.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI notat 32-2003 , 2003.
VTI notat
Keyword [en]
Swedish, Sweden, Simulator, Simulation, traffic, Model, Driving, Behaviour, Vehicle, Computer, Movement, Program
Research subject
Road: Traffic engineering, Road: Traffic theory
URN: urn:nbn:se:vti:diva-1443OAI: diva2:670153
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

Open Access in DiVA

fulltext(860 kB)18 downloads
File information
File name FULLTEXT01.pdfFile size 860 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Janson Olstam, Johan
By organisation
Swedish National Road and Transport Research Institute

Search outside of DiVA

GoogleGoogle Scholar
Total: 18 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 28 hits
ReferencesLink to record
Permanent link

Direct link