Publications by R. Akçelik

R. Akçelik

126 publications, 1975 to 2026.

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2026
SIDRA Glossary of Road Traffic Analysis Terms
R. Akçelik Reference
2025
SIDRA Roundabout Presentation - TORUS Webinar Nov 2025
R. Akçelik Presentation
2025
A Roundabout Capacity Survey Method Using Gap Acceptance Cycles and Vehicle Trajectory Data
G. Chun, N.M. Rouphail, R. Akçelik Technical note
2025
New Survey Method for Calibration of Roundabout Capacity Models
G. Chun, N.M. Rouphail, R. Akçelik Presentation
2025
A New Roundabout Capacity Survey Method
G. Chun, N.M. Rouphail, R. Akçelik Presentation
2025
SIDRA Model Extensions for the Highway Capacity Manual
R. Akçelik Presentation
2024
Traffic modeling: micro-analytical meets micro-simulation
R. Akçelik Presentation
2024
SIDRA Multimodal Capacity and Performance Analysis for Roundabouts
R. Akçelik Presentation
2023
Use of SCATS MF to Calibrate SIDRA Saturation Flow
D. Nash, R. Akçelik, M. Besley, I. Espada Technical note
2023
What is good about analytical traffic modelling?
R. Akçelik Technical note
2022
Intersection Level of Service and Performance Discrepancies
R. Akçelik Conference paper
2022
A Comparative Analysis of Exponential and Linear Roundabout Capacity Models Using HCM Research Data
R. Akçelik, C. Shirke, M. Besley, I. Espada, D. Billinghurst Presentation
2022
Searching for a Gap Acceptance Theory Basis for Linear Capacity Models
R. Akçelik Technical note
2021
Management of Traffic Modelling - A critique of Austroads Report AP-R621-20, 2nd Edition.
R. Akçelik, M. Besley, I. Espada, D. Nash Technical note
2020
Transport modelling for project managers - a critique of Austroads Report AP-R621-20
R. Akçelik, M. Besley, I. Espada, D. Nash Technical note
2019
Are Models becoming smarter than Modellers?
R. Akçelik Presentation
2018
Gap Acceptance Cycles for Modelling Roundabout Capacity and Performance
R. Akçelik Conference paper
2018
Comparing Common Control Group treatment and signal coordination of intersections with separate controllers
R. Akçelik, M. Besley Presentation
2017
Roundabout Model Comparison Table
R. Akçelik Reference
2017
An Assessment of the Highway Capacity Manual Edition 6 Roundabout Capacity Model
R. Akçelik Conference paper
2017
A Comparison of Two Roundabout Capacity Models
E. Macioszek, R. Akçelik Conference paper
2016
Recent Innovations and Applications in SIDRA INTERSECTION: Lane-Based Network Model
R. Akçelik Presentation
2016
Comparing Lane Based and Lane-Group Based Models of Signalised Intersection Networks
R. Akçelik Journal article
2015
Signal Platoon Patterns by Approach Lane use and Movement Class
R. Akçelik, M. Besley Presentation
2015
Roundabouts in Australia: the state of the art on models and applications
R. Akçelik Presentation
2015
Modelling Signal Platoon Patterns by Approach Lane use and Movement Class
R. Akçelik Presentation
2015
Improvement of the West road corridor for accessing to the New Hospital of Lucca (Italy)
F. Nicoli, A. Pratelli, R. Akçelik Presentation
2015
Development of Network Signal Timing Methodology in SIDRA INTERSECTION
R. Akçelik Presentation
2015
Alternative Intersection Analysis Using SIDRA INTERSECTION
R. Akçelik, M. Besley Presentation
2014
Recalibration of a vehicle power model for fuel and emission estimation and its effect on assessment of alternative intersection treatments
R. Akçelik, R. Smit, M. Besley Conference paper
2014
Modelling Queue Spillback and Nearby Signal Effects in a Roundabout Corridor
R. Akçelik Conference paper
2014
Measuring and Assessing Traffic Congestion: A Case Study
C. Yumlu, S. Moridpour, R. Akçelik Conference paper
2014
A New Lane-Based Model for Platooned Patterns at Closely-Spaced Signalised Intersections
R. Akçelik Conference paper
2013
Lane-Based Micro-Analytical Model of a Roundabout Corridor
R. Akçelik Conference paper
2012
Issues in Performance Assessment of Sign-Controlled Intersections
R. Akçelik Conference paper
2012
Calibrating Fuel Consumption and Emission Models for Modern Vehicles
R. Akçelik, R. Smit, M. Besley Conference paper
2012
An Improved Method for Estimating Sign-Controlled Intersection Capacity
R. Akçelik Conference paper
2011
Some Common and Differing Aspects of Alternative Models for Roundabout Capacity and Performance Estimation
R. Akçelik Conference paper
2011
Roundabout Metering Signals: Capacity, Performance and Timing
R. Akçelik Conference paper
2011
Roundabout Design and Capacity Analysis in Australia and New Zealand
R. Akçelik Presentation
2011
ROUNDABOUTS - Comments on the SIDRA INTERSECTION Model and the TRL (UK) Linear Regression Model
R. Akçelik Paper
2011
An assessment of the Highway Capacity Manual 2010 roundabout capacity model
R. Akçelik Conference paper
2009
Evaluating Roundabout Capacity, Level of Service and Performance
R. Akçelik Conference paper
2008
The Relationship between Capacity and Driver Behaviour
R. Akçelik Conference paper
2008
Roundabouts in Australia
R. Akçelik Conference paper
2008
An Investigation of the Performance of Roundabouts with Metering Signals
R. Akçelik Conference paper
2007
Microsimulation and Analytical Models for Traffic Engineering
R. Akçelik Presentation
2007
A Review of Gap-Acceptance Capacity Models
R. Akçelik Conference paper
2006
Speed - Flow and Bunching Models for Uninterrupted Flows
R. Akçelik Conference paper
2006
Operating Cost, Fuel Consumption and Pollutant Emission Savings at a Roundabout with METERING SIGNALS
R. Akçelik Conference paper
2005
Roundabout Model Calibration Issues and a Case Study
R. Akçelik Conference paper
2005
Capacity and Performance Analysis of Roundabout Metering Signals
R. Akçelik Conference paper
2004
Roundabouts with Unbalanced Flow Patterns
R. Akçelik Conference paper
2004
Differences between the AUSTROADS Roundabout Guide and aaSIDRA Roundabout Analysis Methods
R. Akçelik, M. Besley Journal article
2003
Speed - Flow and Bunching Relationships for Uninterrupted Flows
R. Akçelik Conference paper
2003
Operating Cost, Fuel Consumption, and Emission Models in aaSIDRA and aaMotion
R. Akçelik, M. Besley Conference paper
2003
A Roundabout Case Study Comparing Capacity Estimates from Alternative Analytical Models
R. Akçelik Conference paper
2002
Speed - Flow Models for Uninterrupted Traffic Facilities
R. Akçelik Report
2002
Queue Discharge Flow and Speed Models for Signalised Intersections
R. Akçelik, M. Besley Conference paper
2002
Estimating Negotiation Radius, Distance and Speed for Vehicles using Roundabouts
R. Akçelik Conference paper
2001
Progression Factors in the HCM 2000 Queue and Delay Models for Traffic Signals
R. Akçelik Report
2001
Pedestrian Movement Characteristics at Signalised Intersections
S. Bennett, A. Felton, R. Akçelik Conference paper
2001
Microsimulation and Analytical Methods for Modelling Urban Traffic
R. Akçelik, M. Besley Conference paper
2001
HCM 2000 Back of Queue Model for Signalised Intersections
R. Akçelik Report
2001
Acceleration and Deceleration Models
R. Akçelik, M. Besley Conference paper
2000
On the Validity of Some Traffic Engineering Folklore
R. Akçelik Conference paper
1999
Traffic Management Performance - Development of the Traffic Frustration Index
T. Gunatillake, P. Cairney, R. Akçelik Report
1999
Fundamental Relationships for Traffic Flows at Signalised Intersections
R. Akçelik, M. Besley, R. Roper Conference paper
1999
Fundamental Relationships for Freeway Traffic Flows
R. Akçelik, R. Roper, M. Besley Conference paper
1998
Roundabout Capacity and Performance
R. Akçelik Presentation
1998
An evaluation of SCATS Master Isolated control
R. Akçelik, M. Besley, E. Chung Conference paper
1998
A Comparison of Three Delay Models for Sign-Controlled Intersections and Roundabouts
R. Akçelik, B. Christensen, E. Chung Journal article
1997
Three-Laning a Two-Lane Roundabout - The Outcomes
A. O'Brien, R. Akçelik, D. Williamson, T. Pantas Conference paper
1997
Recent Research on Actuated Signal Timing and Performance Evaluation and its Application in SIDRA 5
R. Akçelik, E. Chung, M. Besley Conference paper
1997
Lane-By-Lane Modelling of Unequal Lane use and Flares at Roundabouts and Signalised Intersections: The SIDRA Solution
R. Akçelik Paper
1997
Fundamental Traffic Variables in Adaptive Control and the SCATS DS Parameter
R. Akçelik Conference paper
1997
Analysis of Roundabout Performance by Modelling Approach Flow Interactions
R. Akçelik, E. Chung, M. Besley Conference paper
1996
Relating Flow, Density, Speed and Travel Time Models for Uninterrupted and Interrupted Traffic
R. Akçelik Journal article
1996
Progression Factor for Queue Length and Other Queue-Related Statistics
R. Akçelik Journal article
1996
Performance of Roundabouts under Heavy Demand Conditions
R. Akçelik, E. Chung, M. Besley Journal article
1995
Signal Timing Calculation Methods for Vehicle-Actuated and Fixed-Time Signals
R. Akçelik Working paper
1995
Signal Timing Analysis for Vehicle-Actuated Control
R. Akçelik Working paper
1995
Not "the greatest new development in traffic engineering since the traffic signal"
R. Akçelik Journal article
1994
Traffic Performance Models for Unsignalised Intersections and Fixed-Time Signals
R. Akçelik, E. Chung Journal article
1994
Route Choice and Signal Control: The Potential for Integrated Route Guidance
R. Akçelik Journal article
1994
Overflow Queues and Delays with Random and Platooned Arrivals at Signalized Intersections
R. Akçelik, N.M. Rouphail Journal article
1994
Overflow Delay Estimation for a Simple Intersection with Fully Actuated Signal Control
J. Li, N.M. Rouphail, R. Akçelik Journal article
1994
Gap Acceptance Modelling by Traffic Signal Analogy
R. Akçelik Journal article
1994
Estimation of Green Times and Cycle Time for Vehicle-Actuated Signals
R. Akçelik Journal article
1994
Calibration of the Bunched Exponential Distribution of Arrival Headways
R. Akçelik, E. Chung Journal article
1993
Overflow Delay at a Signalized Intersection Approach Influenced by an Upstream Signal: An Analytical Investigation
A. Tarko, N.M. Rouphail, R. Akçelik Journal article
1993
Estimation of Delays at Traffic Signals for Variable Demand Conditions
R. Akçelik, N.M. Rouphail Paper
1992
Oversaturation Delay Estimates with Consideration of Peaking
N.M. Rouphail, R. Akçelik Journal article
1992
Comparison of Roundabout Capacity and Delay Estimates from Analytical and Simulation Models
E. Chung, W. Young, R. Akçelik Conference paper
1991
Travel Time Functions for Transport Planning Purposes: Davidson's Function, its Time-Dependent form and an Alternative Travel Time Function
R. Akçelik Paper
1991
Implementations of the Australian Roundabout Analysis Method in SIDRA
R. Akçelik, R. Troutbeck Conference paper
1990
SIDRA for the Highway Capacity Manual
R. Akçelik Conference paper
1990
Green Splits with Priority to Selected Movements
R. Akçelik Journal article
1990
Comments on the Application of Queueing Theory to Delays at Signals
R. Akçelik Paper
1989
On the Estimation of Lane Flows for Intersection Analysis
R. Akçelik Paper
1989
Efficiency and Drag in the Power-Based Model of Fuel Consumption
R. Akçelik Paper
1988
The Highway Capacity Manual delay formula for Signalised Intersections
R. Akçelik Journal article
1988
Opposed Turns at Signalised Intersections: The Australian Method
R. Akçelik Journal article
1988
Capacity of a Shared Lane
R. Akçelik Conference paper
1987
Estimating Effect of Vehicle Characteristics on Fuel Consumption
R. Akçelik, D.C. Biggs Journal article
1987
Acceleration Profile Models for Vehicles in Road Traffic
R. Akçelik, D.C. Biggs Journal article
1986
Models for Estimation of Car Fuel Consumption in Urban Traffic
D.C. Biggs, R. Akçelik Journal article
1986
Fuel Consumption Analyses for Urban Traffic Management
D.P. Bowyer, R. Akçelik, D.C. Biggs Journal article
1986
Estimation of Car Fuel Consumption in Urban Traffic
D.C. Biggs, R. Akçelik Journal article
1986
An Energy-Related Model of Instantaneous Fuel Consumption
D.C. Biggs, R. Akçelik Journal article
1985
Guide to Fuel Consumption Analysis for Urban Traffic Management
D.P. Bowyer, R. Akçelik, D.C. Biggs Conference paper
1985
An Interpretation of the Parameters in the Simple Average Travel Speed Model of Fuel Consumption
D.C. Biggs, R. Akçelik Paper
1985
A Discussion on The Paper on Fuel Consumption Modelling by Post Et Al
R. Akçelik, D.C. Biggs Journal article
1984
SIDRA-2 does it Lane by Lane
R. Akçelik Conference paper
1983
Progress in Fuel Consumption Modelling for Urban Traffic Management
R. Akçelik Report
1983
Appraisal of Eight Small Area Traffic Management Tools
J.Y.K. Luk, R. Akçelik, D.P. Bowyer, R.E. Brindle Paper
1983
A Hierarchy of Vehicle Fuel Consumption Models
R. Akçelik, C. Bayley, D.P. Bowyer, D.C. Biggs Journal article
1981
Traffic Signals: Capacity and Timing Analysis
R. Akçelik Report
1981
Fuel Efficiency and other objectives in Traffic System Management
R. Akçelik Journal article
1980
Time-Dependent Expressions for Delay, Stop Rate and Queue Length at Traffic Signals
R. Akçelik Report
1980
Stops at Traffic Signals
R. Akçelik Conference paper
1979
A Graphical Explanation of the two Principles and two Techniques of Traffic Assignment
R. Akçelik Paper
1978
X and Y in Traffic Signal Design
R. Akçelik Conference paper
1976
Route Control-Simulation Experiments
R. Akçelik, M.J. Maher Journal article
1976
Route Control of Traffic in Urban Road Networks: Review and Principles
R. Akçelik, M.J. Maher Journal article
1975
The re-distributional Effects of an area Traffic Control Policy
M.J. Maher, R. Akçelik Journal article

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